20522164 has 24 divisors (see below), whose sum is σ = 40360320. Its totient is φ = 9059424.

The previous prime is 20522149. The next prime is 20522197. The reversal of 20522164 is 46122502.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7384 + ... + 9775.

It is an arithmetic number, because the mean of its divisors is an integer number (1681680).

Almost surely, 2^20522164 is an apocalyptic number.

It is an amenable number.

20522164 is a deficient number, since it is larger than the sum of its proper divisors (19838156).

20522164 is a wasteful number, since it uses less digits than its factorization.

20522164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17199 (or 17197 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20522164 is about 4530.1395122005. The cubic root of 20522164 is about 273.7837816848.

Adding to 20522164 its reverse (46122502), we get a palindrome (66644666).

The spelling of 20522164 in words is "twenty million, five hundred twenty-two thousand, one hundred sixty-four".