21712765276 has 48 divisors (see below), whose sum is σ = 39720441600. Its totient is φ = 10372497408.

The previous prime is 21712765271. The next prime is 21712765303. The reversal of 21712765276 is 67256721712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21712765271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4678165 + ... + 4682803.

It is an arithmetic number, because the mean of its divisors is an integer number (827509200).

Almost surely, 2^21712765276 is an apocalyptic number.

It is an amenable number.

21712765276 is a deficient number, since it is larger than the sum of its proper divisors (18007676324).

21712765276 is a wasteful number, since it uses less digits than its factorization.

21712765276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086 (or 5084 counting only the distinct ones).

The product of its digits is 493920, while the sum is 46.

The spelling of 21712765276 in words is "twenty-one billion, seven hundred twelve million, seven hundred sixty-five thousand, two hundred seventy-six".