21615079996 has 12 divisors (see below), whose sum is σ = 37827420120. Its totient is φ = 10807245680.

The previous prime is 21615079973. The next prime is 21615080017. The reversal of 21615079996 is 69997051612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243126 + ... + 319906.

It is an arithmetic number, because the mean of its divisors is an integer number (3152285010).

Almost surely, 2^21615079996 is an apocalyptic number.

It is an amenable number.

21615079996 is a deficient number, since it is larger than the sum of its proper divisors (16212340124).

21615079996 is a wasteful number, since it uses less digits than its factorization.

21615079996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147164 (or 147162 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 55.

The spelling of 21615079996 in words is "twenty-one billion, six hundred fifteen million, seventy-nine thousand, nine hundred ninety-six".