18993134258 has 32 divisors (see below), whose sum is σ = 33985889280. Its totient is φ = 7783578000.

The previous prime is 18993134239. The next prime is 18993134273. The reversal of 18993134258 is 85243139981.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1325633 + ... + 1339883.

It is an arithmetic number, because the mean of its divisors is an integer number (1062059040).

Almost surely, 2^18993134258 is an apocalyptic number.

18993134258 is a deficient number, since it is larger than the sum of its proper divisors (14992755022).

18993134258 is a wasteful number, since it uses less digits than its factorization.

18993134258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18422.

The product of its digits is 1866240, while the sum is 53.

The spelling of 18993134258 in words is "eighteen billion, nine hundred ninety-three million, one hundred thirty-four thousand, two hundred fifty-eight".