18918523258 has 8 divisors (see below), whose sum is σ = 28379391552. Its totient is φ = 9458726076.

The previous prime is 18918523229. The next prime is 18918523271. The reversal of 18918523258 is 85232581981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222060 + ... + 295207.

It is an arithmetic number, because the mean of its divisors is an integer number (3547423944).

Almost surely, 2^18918523258 is an apocalyptic number.

18918523258 is a deficient number, since it is larger than the sum of its proper divisors (9460868294).

18918523258 is a wasteful number, since it uses less digits than its factorization.

18918523258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535556.

The product of its digits is 1382400, while the sum is 52.

The spelling of 18918523258 in words is "eighteen billion, nine hundred eighteen million, five hundred twenty-three thousand, two hundred fifty-eight".