23445530781 has 4 divisors (see below), whose sum is σ = 31260707712. Its totient is φ = 15630353852.

The previous prime is 23445530777. The next prime is 23445530789. The reversal of 23445530781 is 18703554432.

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 not a de Polignac number, because 23445530781 - 2² = 23445530777 is a prime.

It is a super-2 number, since 2×23445530781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23445530789) 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, 3907588461 + ... + 3907588466.

It is an arithmetic number, because the mean of its divisors is an integer number (7815176928).

Almost surely, 2^23445530781 is an apocalyptic number.

It is an amenable number.

23445530781 is a deficient number, since it is larger than the sum of its proper divisors (7815176931).

23445530781 is an equidigital number, since it uses as much as digits as its factorization.

23445530781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7815176930.

The product of its (nonzero) digits is 403200, while the sum is 42.

The spelling of 23445530781 in words is "twenty-three billion, four hundred forty-five million, five hundred thirty thousand, seven hundred eighty-one".