21764757275 has 12 divisors (see below), whose sum is σ = 26991637752. Its totient is φ = 17409651840.

The previous prime is 21764757251. The next prime is 21764757281. The reversal of 21764757275 is 57275746712.

It is not a de Polignac number, because 21764757275 - 2²⁰ = 21763708699 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170627 + ... + 269523.

It is an arithmetic number, because the mean of its divisors is an integer number (2249303146).

Almost surely, 2^21764757275 is an apocalyptic number.

21764757275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21764757275 is a deficient number, since it is larger than the sum of its proper divisors (5226880477).

21764757275 is an equidigital number, since it uses as much as digits as its factorization.

21764757275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107710 (or 107705 counting only the distinct ones).

The product of its digits is 5762400, while the sum is 53.

The spelling of 21764757275 in words is "twenty-one billion, seven hundred sixty-four million, seven hundred fifty-seven thousand, two hundred seventy-five".