21670973115 has 64 divisors (see below), whose sum is σ = 39171686400. Its totient is φ = 10134028800.

The previous prime is 21670973101. The next prime is 21670973143. The reversal of 21670973115 is 51137907612.

It is not a de Polignac number, because 21670973115 - 2¹⁰ = 21670972091 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6118245 + ... + 6121785.

It is an arithmetic number, because the mean of its divisors is an integer number (612057600).

Almost surely, 2^21670973115 is an apocalyptic number.

21670973115 is a deficient number, since it is larger than the sum of its proper divisors (17500713285).

21670973115 is a wasteful number, since it uses less digits than its factorization.

21670973115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4868.

The product of its (nonzero) digits is 79380, while the sum is 42.

The spelling of 21670973115 in words is "twenty-one billion, six hundred seventy million, nine hundred seventy-three thousand, one hundred fifteen".