21972250712 has 128 divisors (see below), whose sum is σ = 47159884800. Its totient is φ = 9533048832.

The previous prime is 21972250679. The next prime is 21972250733. The reversal of 21972250712 is 21705227912.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27568298 + ... + 27569094.

It is an arithmetic number, because the mean of its divisors is an integer number (368436600).

Almost surely, 2^21972250712 is an apocalyptic number.

It is an amenable number.

21972250712 is an abundant number, since it is smaller than the sum of its proper divisors (25187634088).

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

21972250712 is a wasteful number, since it uses less digits than its factorization.

21972250712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113 (or 1109 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 21972250712 in words is "twenty-one billion, nine hundred seventy-two million, two hundred fifty thousand, seven hundred twelve".