21227363756 has 24 divisors (see below), whose sum is σ = 37349458944. Its totient is φ = 10556179920.

The previous prime is 21227363747. The next prime is 21227363761. The reversal of 21227363756 is 65736372212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991121 + ... + 1012311.

It is an arithmetic number, because the mean of its divisors is an integer number (1556227456).

Almost surely, 2^21227363756 is an apocalyptic number.

It is an amenable number.

21227363756 is a deficient number, since it is larger than the sum of its proper divisors (16122095188).

21227363756 is a wasteful number, since it uses less digits than its factorization.

21227363756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22541 (or 22539 counting only the distinct ones).

The product of its digits is 635040, while the sum is 44.

The spelling of 21227363756 in words is "twenty-one billion, two hundred twenty-seven million, three hundred sixty-three thousand, seven hundred fifty-six".