23355520015 has 4 divisors (see below), whose sum is σ = 28026624024. Its totient is φ = 18684416008.

The previous prime is 23355520009. The next prime is 23355520033. The reversal of 23355520015 is 51002555332.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23355520015 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

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, 2335551997 + ... + 2335552006.

It is an arithmetic number, because the mean of its divisors is an integer number (7006656006).

Almost surely, 2^23355520015 is an apocalyptic number.

23355520015 is a deficient number, since it is larger than the sum of its proper divisors (4671104009).

23355520015 is an equidigital number, since it uses as much as digits as its factorization.

23355520015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671104008.

The product of its (nonzero) digits is 22500, while the sum is 31.

The spelling of 23355520015 in words is "twenty-three billion, three hundred fifty-five million, five hundred twenty thousand, fifteen".