23122543520 has 24 divisors (see below), whose sum is σ = 54627009444. Its totient is φ = 9249017344.

The previous prime is 23122543501. The next prime is 23122543627. The reversal of 23122543520 is 2534522132.

It can be written as a sum of positive squares in 2 ways, for example, as 21084201616 + 2038341904 = 145204^2 + 45148^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72257789 + ... + 72258108.

Almost surely, 2^23122543520 is an apocalyptic number.

23122543520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23122543520 is an abundant number, since it is smaller than the sum of its proper divisors (31504465924).

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

23122543520 is a wasteful number, since it uses less digits than its factorization.

23122543520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144515912 (or 144515904 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 23122543520 in words is "twenty-three billion, one hundred twenty-two million, five hundred forty-three thousand, five hundred twenty".