20722864072 has 32 divisors (see below), whose sum is σ = 39267633600. Its totient is φ = 10251640000.

The previous prime is 20722864061. The next prime is 20722864081. The reversal of 20722864072 is 27046822702.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1251447 + ... + 1267897.

It is an arithmetic number, because the mean of its divisors is an integer number (1227113550).

Almost surely, 2^20722864072 is an apocalyptic number.

It is an amenable number.

20722864072 is a deficient number, since it is larger than the sum of its proper divisors (18544769528).

20722864072 is a wasteful number, since it uses less digits than its factorization.

20722864072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18117 (or 18113 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 40.

The spelling of 20722864072 in words is "twenty billion, seven hundred twenty-two million, eight hundred sixty-four thousand, seventy-two".