21611679396 has 48 divisors (see below), whose sum is σ = 52428432000. Its totient is φ = 6920508672.

The previous prime is 21611679389. The next prime is 21611679469. The reversal of 21611679396 is 69397611612.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86785 + ... + 225288.

It is an arithmetic number, because the mean of its divisors is an integer number (1092259000).

Almost surely, 2^21611679396 is an apocalyptic number.

It is an amenable number.

21611679396 is an abundant number, since it is smaller than the sum of its proper divisors (30816752604).

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

21611679396 is a wasteful number, since it uses less digits than its factorization.

21611679396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312308 (or 312306 counting only the distinct ones).

The product of its digits is 734832, while the sum is 51.

The spelling of 21611679396 in words is "twenty-one billion, six hundred eleven million, six hundred seventy-nine thousand, three hundred ninety-six".