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20195725 = 52112331103
BaseRepresentation
bin100110100001…
…0100110001101
31102000001022211
41031002212031
520132230400
62000510421
7333442444
oct115024615
942001284
1020195725
1110444390
12691b411
134251544
142979d5b
151b8ddba
hex134298d

20195725 has 48 divisors (see below), whose sum is σ = 29712384. Its totient is φ = 13464000.

The previous prime is 20195723. The next prime is 20195761. The reversal of 20195725 is 52759102.

It is not a de Polignac number, because 20195725 - 21 = 20195723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20195723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 196024 + ... + 196126.

It is an arithmetic number, because the mean of its divisors is an integer number (619008).

Almost surely, 220195725 is an apocalyptic number.

20195725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20195725 is a deficient number, since it is larger than the sum of its proper divisors (9516659).

20195725 is a wasteful number, since it uses less digits than its factorization.

20195725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 20195725 is about 4493.9653981756. The cubic root of 20195725 is about 272.3243544457.

It can be divided in two parts, 2019 and 5725, that added together give a square (7744 = 882).

The spelling of 20195725 in words is "twenty million, one hundred ninety-five thousand, seven hundred twenty-five".

Divisors: 1 5 11 23 25 31 55 103 115 155 253 275 341 515 575 713 775 1133 1265 1705 2369 2575 3193 3565 5665 6325 7843 8525 11845 15965 17825 26059 28325 35123 39215 59225 73439 79825 130295 175615 196075 367195 651475 807829 878075 1835975 4039145 20195725