21968233265 has 16 divisors (see below), whose sum is σ = 29750086080. Its totient is φ = 15425968320.

The previous prime is 21968233253. The next prime is 21968233277. The reversal of 21968233265 is 56233286912.

It is an interprime number because it is at equal distance from previous prime (21968233253) and next prime (21968233277).

It is not a de Polignac number, because 21968233265 - 2⁶ = 21968233201 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6884999 + ... + 6888188.

It is an arithmetic number, because the mean of its divisors is an integer number (1859380380).

Almost surely, 2^21968233265 is an apocalyptic number.

It is an amenable number.

21968233265 is a deficient number, since it is larger than the sum of its proper divisors (7781852815).

21968233265 is a wasteful number, since it uses less digits than its factorization.

21968233265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13773232.

The product of its digits is 933120, while the sum is 47.

The spelling of 21968233265 in words is "twenty-one billion, nine hundred sixty-eight million, two hundred thirty-three thousand, two hundred sixty-five".