21179907482 has 16 divisors (see below), whose sum is σ = 32846728704. Its totient is φ = 10232082000.

The previous prime is 21179907479. The next prime is 21179907523. The reversal of 21179907482 is 28470997112.

It is a self number, because there is not a number n which added to its sum of digits gives 21179907482.

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, 231569 + ... + 309812.

It is an arithmetic number, because the mean of its divisors is an integer number (2052920544).

Almost surely, 2^21179907482 is an apocalyptic number.

21179907482 is a deficient number, since it is larger than the sum of its proper divisors (11666821222).

21179907482 is a wasteful number, since it uses less digits than its factorization.

21179907482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542045.

The product of its (nonzero) digits is 508032, while the sum is 50.

The spelling of 21179907482 in words is "twenty-one billion, one hundred seventy-nine million, nine hundred seven thousand, four hundred eighty-two".