20004408 has 40 divisors (see below), whose sum is σ = 56032680. Its totient is φ = 6667920.

The previous prime is 20004367. The next prime is 20004419. The reversal of 20004408 is 80440002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14788 + ... + 16083.

It is an arithmetic number, because the mean of its divisors is an integer number (1400817).

Almost surely, 2^20004408 is an apocalyptic number.

It is an amenable number.

20004408 is an abundant number, since it is smaller than the sum of its proper divisors (36028272).

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

20004408 is a wasteful number, since it uses less digits than its factorization.

20004408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30889 (or 30876 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 20004408 is about 4472.6287572299. The cubic root of 20004408 is about 271.4617021160.

The spelling of 20004408 in words is "twenty million, four thousand, four hundred eight".