20538804 has 48 divisors (see below), whose sum is σ = 56306880. Its totient is φ = 5744640.

The previous prime is 20538773. The next prime is 20538823. The reversal of 20538804 is 40883502.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 4269 + ... + 7700.

It is an arithmetic number, because the mean of its divisors is an integer number (1173060).

Almost surely, 2^20538804 is an apocalyptic number.

It is an amenable number.

20538804 is an abundant number, since it is smaller than the sum of its proper divisors (35768076).

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

20538804 is a wasteful number, since it uses less digits than its factorization.

20538804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12000 (or 11998 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20538804 is about 4531.9757280903. The cubic root of 20538804 is about 273.8577591232.

The spelling of 20538804 in words is "twenty million, five hundred thirty-eight thousand, eight hundred four".