23170805081 has 4 divisors (see below), whose sum is σ = 23173123200. Its totient is φ = 23168486964.

The previous prime is 23170805071. The next prime is 23170805089. The reversal of 23170805081 is 18050807132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23170805081 is a prime.

It is a super-2 number, since 2×23170805081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23170805089) 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, 1144001 + ... + 1164078.

It is an arithmetic number, because the mean of its divisors is an integer number (5793280800).

Almost surely, 2^23170805081 is an apocalyptic number.

It is an amenable number.

23170805081 is a deficient number, since it is larger than the sum of its proper divisors (2318119).

23170805081 is a wasteful number, since it uses less digits than its factorization.

23170805081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318118.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 23170805081 in words is "twenty-three billion, one hundred seventy million, eight hundred five thousand, eighty-one".