23507800091 has 4 divisors (see below), whose sum is σ = 23508141384. Its totient is φ = 23507458800.

The previous prime is 23507800079. The next prime is 23507800093. The reversal of 23507800091 is 19000870532.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23507800091 - 2³⁴ = 6327930907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23507800093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27050 + ... + 218511.

It is an arithmetic number, because the mean of its divisors is an integer number (5877035346).

Almost surely, 2^23507800091 is an apocalyptic number.

23507800091 is a deficient number, since it is larger than the sum of its proper divisors (341293).

23507800091 is an equidigital number, since it uses as much as digits as its factorization.

23507800091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341292.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 23507800091 in words is "twenty-three billion, five hundred seven million, eight hundred thousand, ninety-one".