20722964 has 12 divisors (see below), whose sum is σ = 36724800. Its totient is φ = 10230168.

The previous prime is 20722963. The next prime is 20722967. The reversal of 20722964 is 46922702.

It is a super-5 number, since 5×20722964⁵ (a number of 38 digits) contains 55555 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20722964.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20722963) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 32474 + ... + 33105.

It is an arithmetic number, because the mean of its divisors is an integer number (3060400).

Almost surely, 2^20722964 is an apocalyptic number.

It is an amenable number.

20722964 is a deficient number, since it is larger than the sum of its proper divisors (16001836).

20722964 is a wasteful number, since it uses less digits than its factorization.

20722964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65662 (or 65660 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 20722964 is about 4552.2482357622. The cubic root of 20722964 is about 274.6738347906.

The spelling of 20722964 in words is "twenty million, seven hundred twenty-two thousand, nine hundred sixty-four".