21179432862 has 48 divisors (see below), whose sum is σ = 52602855552. Its totient is φ = 6032972880.

The previous prime is 21179432851. The next prime is 21179432887. The reversal of 21179432862 is 26823497112.

It is a super-2 number, since 2×21179432862² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 212208 + ... + 295619.

It is an arithmetic number, because the mean of its divisors is an integer number (1095892824).

Almost surely, 2^21179432862 is an apocalyptic number.

21179432862 is an abundant number, since it is smaller than the sum of its proper divisors (31423422690).

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

21179432862 is a wasteful number, since it uses less digits than its factorization.

21179432862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508173 (or 508170 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The spelling of 21179432862 in words is "twenty-one billion, one hundred seventy-nine million, four hundred thirty-two thousand, eight hundred sixty-two".