20902924 has 12 divisors (see below), whose sum is σ = 41805904. Its totient is φ = 8958384.

The previous prime is 20902901. The next prime is 20902943. The reversal of 20902924 is 42920902.

It is a happy number.

20902924 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 746533 = 20902924 / (2 + 0 + 9 + 0 + 2 + 9 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 20902892 and 20902901.

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 3 ways as a sum of consecutive naturals, for example, 373239 + ... + 373294.

Almost surely, 2^20902924 is an apocalyptic number.

It is an amenable number.

20902924 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20902924 is a wasteful number, since it uses less digits than its factorization.

20902924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746544 (or 746542 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20902924 is about 4571.9715659658. The cubic root of 20902924 is about 275.4666413277.

The spelling of 20902924 in words is "twenty million, nine hundred two thousand, nine hundred twenty-four".