Base | Representation |
---|---|
bin | 100110100001… |
… | …0100110001101 |
3 | 1102000001022211 |
4 | 1031002212031 |
5 | 20132230400 |
6 | 2000510421 |
7 | 333442444 |
oct | 115024615 |
9 | 42001284 |
10 | 20195725 |
11 | 10444390 |
12 | 691b411 |
13 | 4251544 |
14 | 2979d5b |
15 | 1b8ddba |
hex | 134298d |
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".
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