20902536 has 40 divisors (see below), whose sum is σ = 58548270. Its totient is φ = 6967296.

The previous prime is 20902529. The next prime is 20902573. The reversal of 20902536 is 63520902.

It can be written as a sum of positive squares in only one way, i.e., 19448100 + 1454436 = 4410^2 + 1206^2 .

It is a super-2 number, since 2×20902536² = 873832022462592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 15481 + ... + 16776.

Almost surely, 2^20902536 is an apocalyptic number.

It is an amenable number.

20902536 is an abundant number, since it is smaller than the sum of its proper divisors (37645734).

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

20902536 is a wasteful number, since it uses less digits than its factorization.

20902536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32275 (or 32262 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20902536 is about 4571.9291333090. The cubic root of 20902536 is about 275.4649369136.

The spelling of 20902536 in words is "twenty million, nine hundred two thousand, five hundred thirty-six".