20912704 has 28 divisors (see below), whose sum is σ = 43305984. Its totient is φ = 10001024.

The previous prime is 20912677. The next prime is 20912707. The reversal of 20912704 is 40721902.

20912704 = T₁₃₃₇ + T₁₃₃₈ + ... + T₁₃₅₉.

It is not an unprimeable number, because it can be changed into a prime (20912707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5632 + ... + 8575.

Almost surely, 2^20912704 is an apocalyptic number.

It is an amenable number.

20912704 is an abundant number, since it is smaller than the sum of its proper divisors (22393280).

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

20912704 is a wasteful number, since it uses less digits than its factorization.

20912704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14242 (or 14232 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 20912704 is about 4573.0410013469. The cubic root of 20912704 is about 275.5095961427.

The spelling of 20912704 in words is "twenty million, nine hundred twelve thousand, seven hundred four".