20904264 has 32 divisors (see below), whose sum is σ = 58068000. Its totient is φ = 6968016.

The previous prime is 20904251. The next prime is 20904277. The reversal of 20904264 is 46240902.

It is an interprime number because it is at equal distance from previous prime (20904251) and next prime (20904277).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48174 + ... + 48605.

It is an arithmetic number, because the mean of its divisors is an integer number (1814625).

Almost surely, 2^20904264 is an apocalyptic number.

20904264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20904264 is an abundant number, since it is smaller than the sum of its proper divisors (37163736).

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

20904264 is a wasteful number, since it uses less digits than its factorization.

20904264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96794 (or 96784 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20904264 is about 4572.1181087107. The cubic root of 20904264 is about 275.4725275443.

The spelling of 20904264 in words is "twenty million, nine hundred four thousand, two hundred sixty-four".