20088904 has 24 divisors (see below), whose sum is σ = 41404230. Its totient is φ = 9130880.

The previous prime is 20088841. The next prime is 20088911. The reversal of 20088904 is 40988002.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 1684804 = 4290^2 + 1298^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9409 + ... + 11344.

Almost surely, 2^20088904 is an apocalyptic number.

It is an amenable number.

20088904 is an abundant number, since it is smaller than the sum of its proper divisors (21315326).

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

20088904 is a wasteful number, since it uses less digits than its factorization.

20088904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20781 (or 20766 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 20088904 is about 4482.0647027904. The cubic root of 20088904 is about 271.8433714737.

The spelling of 20088904 in words is "twenty million, eighty-eight thousand, nine hundred four".