20626564 has 24 divisors (see below), whose sum is σ = 41424768. Its totient is φ = 8803200.

The previous prime is 20626547. The next prime is 20626589. The reversal of 20626564 is 46562602.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 5964 + ... + 8764.

It is an arithmetic number, because the mean of its divisors is an integer number (1726032).

Almost surely, 2^20626564 is an apocalyptic number.

It is an amenable number.

20626564 is an abundant number, since it is smaller than the sum of its proper divisors (20798204).

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

20626564 is a wasteful number, since it uses less digits than its factorization.

20626564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3075 (or 3073 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 20626564 is about 4541.6477186149. The cubic root of 20626564 is about 274.2472593555.

The spelling of 20626564 in words is "twenty million, six hundred twenty-six thousand, five hundred sixty-four".