21944216228 has 48 divisors (see below), whose sum is σ = 42643117440. Its totient is φ = 9797222400.

The previous prime is 21944216197. The next prime is 21944216243. The reversal of 21944216228 is 82261244912.

It is a super-2 number, since 2×21944216228² (a number of 21 digits) contains 22 as substring.

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, 827300 + ... + 853412.

It is an arithmetic number, because the mean of its divisors is an integer number (888398280).

Almost surely, 2^21944216228 is an apocalyptic number.

It is an amenable number.

21944216228 is a deficient number, since it is larger than the sum of its proper divisors (20698901212).

21944216228 is a wasteful number, since it uses less digits than its factorization.

21944216228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26468 (or 26466 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The spelling of 21944216228 in words is "twenty-one billion, nine hundred forty-four million, two hundred sixteen thousand, two hundred twenty-eight".