18335550959 has 24 divisors (see below), whose sum is σ = 20422262784. Its totient is φ = 16448216400.

The previous prime is 18335550911. The next prime is 18335550979. The reversal of 18335550959 is 95905553381.

It is not a de Polignac number, because 18335550959 - 2²⁰ = 18334502383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18335550959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18335550979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2931974 + ... + 2938220.

It is an arithmetic number, because the mean of its divisors is an integer number (850927616).

Almost surely, 2^18335550959 is an apocalyptic number.

18335550959 is a deficient number, since it is larger than the sum of its proper divisors (2086711825).

18335550959 is a wasteful number, since it uses less digits than its factorization.

18335550959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6587 (or 6576 counting only the distinct ones).

The product of its (nonzero) digits is 3645000, while the sum is 53.

The spelling of 18335550959 in words is "eighteen billion, three hundred thirty-five million, five hundred fifty thousand, nine hundred fifty-nine".