21952876317 has 8 divisors (see below), whose sum is σ = 30811054560. Its totient is φ = 13864974480.

The previous prime is 21952876247. The next prime is 21952876327. The reversal of 21952876317 is 71367825912.

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

It is not a de Polignac number, because 21952876317 - 2⁸ = 21952876061 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 21952876317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21952876327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192569034 + ... + 192569147.

It is an arithmetic number, because the mean of its divisors is an integer number (3851381820).

Almost surely, 2^21952876317 is an apocalyptic number.

It is an amenable number.

21952876317 is a deficient number, since it is larger than the sum of its proper divisors (8858178243).

21952876317 is a wasteful number, since it uses less digits than its factorization.

21952876317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385138203.

The product of its digits is 1270080, while the sum is 51.

The spelling of 21952876317 in words is "twenty-one billion, nine hundred fifty-two million, eight hundred seventy-six thousand, three hundred seventeen".