18599500013 has 4 divisors (see below), whose sum is σ = 18599968608. Its totient is φ = 18599031420.

The previous prime is 18599500009. The next prime is 18599500027. The reversal of 18599500013 is 31000599581.

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 18599500013 - 2² = 18599500009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18599530013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168623 + ... + 256188.

It is an arithmetic number, because the mean of its divisors is an integer number (4649992152).

Almost surely, 2^18599500013 is an apocalyptic number.

It is an amenable number.

18599500013 is a deficient number, since it is larger than the sum of its proper divisors (468595).

18599500013 is an equidigital number, since it uses as much as digits as its factorization.

18599500013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468594.

The product of its (nonzero) digits is 48600, while the sum is 41.

The spelling of 18599500013 in words is "eighteen billion, five hundred ninety-nine million, five hundred thousand, thirteen".