21756465712 has 20 divisors (see below), whose sum is σ = 42163223256. Its totient is φ = 10875633920.

The previous prime is 21756465701. The next prime is 21756465761.

21756465712 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92458 + ... + 228169.

Almost surely, 2^21756465712 is an apocalyptic number.

It is an amenable number.

21756465712 is a deficient number, since it is larger than the sum of its proper divisors (20406757544).

21756465712 is a wasteful number, since it uses less digits than its factorization.

21756465712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324876 (or 324870 counting only the distinct ones).

The product of its digits is 705600, while the sum is 46.

The spelling of 21756465712 in words is "twenty-one billion, seven hundred fifty-six million, four hundred sixty-five thousand, seven hundred twelve".