20522656 has 48 divisors (see below), whose sum is σ = 50379840. Its totient is φ = 7994880.

The previous prime is 20522639. The next prime is 20522659. The reversal of 20522656 is 65622502.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (20522659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1701 + ... + 6628.

It is an arithmetic number, because the mean of its divisors is an integer number (1049580).

Almost surely, 2^20522656 is an apocalyptic number.

It is an amenable number.

20522656 is an abundant number, since it is smaller than the sum of its proper divisors (29857184).

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

20522656 is a wasteful number, since it uses less digits than its factorization.

20522656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8357 (or 8349 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 20522656 is about 4530.1938148384. The cubic root of 20522656 is about 273.7859695721.

The spelling of 20522656 in words is "twenty million, five hundred twenty-two thousand, six hundred fifty-six".