21916969315 has 8 divisors (see below), whose sum is σ = 26692906320. Its totient is φ = 17271880032.

The previous prime is 21916969309. The next prime is 21916969331. The reversal of 21916969315 is 51396961912.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21916969315 - 2⁷ = 21916969187 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 32711560 + ... + 32712229.

It is an arithmetic number, because the mean of its divisors is an integer number (3336613290).

Almost surely, 2^21916969315 is an apocalyptic number.

21916969315 is a deficient number, since it is larger than the sum of its proper divisors (4775937005).

21916969315 is an equidigital number, since it uses as much as digits as its factorization.

21916969315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65423861.

The product of its digits is 787320, while the sum is 52.

The spelling of 21916969315 in words is "twenty-one billion, nine hundred sixteen million, nine hundred sixty-nine thousand, three hundred fifteen".