20552564 has 12 divisors (see below), whose sum is σ = 36010464. Its totient is φ = 10263864.

The previous prime is 20552563. The next prime is 20552579. The reversal of 20552564 is 46525502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20552563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1319 + ... + 6545.

It is an arithmetic number, because the mean of its divisors is an integer number (3000872).

Almost surely, 2^20552564 is an apocalyptic number.

It is an amenable number.

20552564 is a deficient number, since it is larger than the sum of its proper divisors (15457900).

20552564 is a wasteful number, since it uses less digits than its factorization.

20552564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6214 (or 6212 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 20552564 is about 4533.4935755993. The cubic root of 20552564 is about 273.9189025983.

The spelling of 20552564 in words is "twenty million, five hundred fifty-two thousand, five hundred sixty-four".