23621964091 has 32 divisors (see below), whose sum is σ = 27496723968. Its totient is φ = 20082416640.

The previous prime is 23621964061. The next prime is 23621964097. The reversal of 23621964091 is 19046912632.

It is not a de Polignac number, because 23621964091 - 2¹⁵ = 23621931323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23621964097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2031105 + ... + 2042701.

It is an arithmetic number, because the mean of its divisors is an integer number (859272624).

Almost surely, 2^23621964091 is an apocalyptic number.

23621964091 is a deficient number, since it is larger than the sum of its proper divisors (3874759877).

23621964091 is a wasteful number, since it uses less digits than its factorization.

23621964091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11811.

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 23621964091 in words is "twenty-three billion, six hundred twenty-one million, nine hundred sixty-four thousand, ninety-one".