21767876712 has 64 divisors (see below), whose sum is σ = 64023177600. Its totient is φ = 6829136640.

The previous prime is 21767876671. The next prime is 21767876759.

21767876712 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2960364 + ... + 2967707.

It is an arithmetic number, because the mean of its divisors is an integer number (1000362150).

Almost surely, 2^21767876712 is an apocalyptic number.

It is an amenable number.

21767876712 is an abundant number, since it is smaller than the sum of its proper divisors (42255300888).

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

21767876712 is a wasteful number, since it uses less digits than its factorization.

21767876712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5928103 (or 5928093 counting only the distinct ones).

The product of its digits is 2765952, while the sum is 54.

The spelling of 21767876712 in words is "twenty-one billion, seven hundred sixty-seven million, eight hundred seventy-six thousand, seven hundred twelve".