21966274488 has 16 divisors (see below), whose sum is σ = 54915686280. Its totient is φ = 7322091488.

The previous prime is 21966274487. The next prime is 21966274493. The reversal of 21966274488 is 88447266912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21966274487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457630695 + ... + 457630742.

Almost surely, 2^21966274488 is an apocalyptic number.

It is an amenable number.

21966274488 is an abundant number, since it is smaller than the sum of its proper divisors (32949411792).

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

21966274488 is a wasteful number, since it uses less digits than its factorization.

21966274488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915261446 (or 915261442 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 57.

The spelling of 21966274488 in words is "twenty-one billion, nine hundred sixty-six million, two hundred seventy-four thousand, four hundred eighty-eight".