18386018358 has 16 divisors (see below), whose sum is σ = 36775784496. Its totient is φ = 6128048160.

The previous prime is 18386018327. The next prime is 18386018383. The reversal of 18386018358 is 85381068381.

It is a self number, because there is not a number n which added to its sum of digits gives 18386018358.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90241 + ... + 211932.

It is an arithmetic number, because the mean of its divisors is an integer number (2298486531).

Almost surely, 2^18386018358 is an apocalyptic number.

18386018358 is an abundant number, since it is smaller than the sum of its proper divisors (18389766138).

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

18386018358 is a wasteful number, since it uses less digits than its factorization.

18386018358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312319.

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 18386018358 in words is "eighteen billion, three hundred eighty-six million, eighteen thousand, three hundred fifty-eight".