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20205042 = 23111323549
BaseRepresentation
bin100110100010…
…0110111110010
31102000112002220
41031010313302
520133030132
62001021510
7333511554
oct115046762
942015086
1020205042
1110450390
126924896
134255860
14297d4d4
151b91a2c
hex1344df2

20205042 has 32 divisors (see below), whose sum is σ = 47476800. Its totient is φ = 5651520.

The previous prime is 20205041. The next prime is 20205077. The reversal of 20205042 is 24050202.

It is not an unprimeable number, because it can be changed into a prime (20205041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10917 + ... + 12632.

It is an arithmetic number, because the mean of its divisors is an integer number (1483650).

Almost surely, 220205042 is an apocalyptic number.

20205042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20205042 is an abundant number, since it is smaller than the sum of its proper divisors (27271758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20205042 is a wasteful number, since it uses less digits than its factorization.

20205042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23578.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20205042 is about 4495.0018909896. The cubic root of 20205042 is about 272.3662256163.

Adding to 20205042 its reverse (24050202), we get a palindrome (44255244).

The spelling of 20205042 in words is "twenty million, two hundred five thousand, forty-two".

Divisors: 1 2 3 6 11 13 22 26 33 39 66 78 143 286 429 858 23549 47098 70647 141294 259039 306137 518078 612274 777117 918411 1554234 1836822 3367507 6735014 10102521 20205042