23123672240 has 20 divisors (see below), whose sum is σ = 53762538144. Its totient is φ = 9249468864.

The previous prime is 23123672213. The next prime is 23123672251. The reversal of 23123672240 is 4227632132.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 23123672197 and 23123672206.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144522872 + ... + 144523031.

Almost surely, 2^23123672240 is an apocalyptic number.

23123672240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23123672240 is an abundant number, since it is smaller than the sum of its proper divisors (30638865904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23123672240 is a wasteful number, since it uses less digits than its factorization.

23123672240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289045916 (or 289045910 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The spelling of 23123672240 in words is "twenty-three billion, one hundred twenty-three million, six hundred seventy-two thousand, two hundred forty".