20522964 has 144 divisors (see below), whose sum is σ = 64350720. Its totient is φ = 5019840.

The previous prime is 20522951. The next prime is 20522977. The reversal of 20522964 is 46922502.

It is an interprime number because it is at equal distance from previous prime (20522951) and next prime (20522977).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122809 + ... + 122975.

It is an arithmetic number, because the mean of its divisors is an integer number (446880).

Almost surely, 2^20522964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20522964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32175360).

20522964 is an abundant number, since it is smaller than the sum of its proper divisors (43827756).

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

20522964 is a wasteful number, since it uses less digits than its factorization.

20522964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20522964 is about 4530.2278088414. The cubic root of 20522964 is about 273.7873392073.

The spelling of 20522964 in words is "twenty million, five hundred twenty-two thousand, nine hundred sixty-four".