21931299675 has 36 divisors (see below), whose sum is σ = 40194933064. Its totient is φ = 11424672000.

The previous prime is 21931299653. The next prime is 21931299679. The reversal of 21931299675 is 57699213912.

It is not a de Polignac number, because 21931299675 - 2¹⁷ = 21931168603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21931299679) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1123726 + ... + 1143075.

Almost surely, 2^21931299675 is an apocalyptic number.

21931299675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21931299675 is a deficient number, since it is larger than the sum of its proper divisors (18263633389).

21931299675 is a wasteful number, since it uses less digits than its factorization.

21931299675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266860 (or 2266852 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The spelling of 21931299675 in words is "twenty-one billion, nine hundred thirty-one million, two hundred ninety-nine thousand, six hundred seventy-five".