20804924 has 24 divisors (see below), whose sum is σ = 43800960. Its totient is φ = 8446896.

The previous prime is 20804911. The next prime is 20804929. The reversal of 20804924 is 42940802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20804929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19022 + ... + 20085.

It is an arithmetic number, because the mean of its divisors is an integer number (1825040).

Almost surely, 2^20804924 is an apocalyptic number.

It is an amenable number.

20804924 is an abundant number, since it is smaller than the sum of its proper divisors (22996036).

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

20804924 is a wasteful number, since it uses less digits than its factorization.

20804924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39137 (or 39135 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20804924 is about 4561.2414976627. The cubic root of 20804924 is about 275.0354731100.

The spelling of 20804924 in words is "twenty million, eight hundred four thousand, nine hundred twenty-four".