18137556874 has 8 divisors (see below), whose sum is σ = 27213053508. Its totient is φ = 9066539040.

The previous prime is 18137556851. The next prime is 18137556901. The reversal of 18137556874 is 47865573181.

It can be written as a sum of positive squares in 2 ways, for example, as 16398083025 + 1739473849 = 128055^2 + 41707^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1109557 + ... + 1125784.

Almost surely, 2^18137556874 is an apocalyptic number.

18137556874 is a deficient number, since it is larger than the sum of its proper divisors (9075496634).

18137556874 is a wasteful number, since it uses less digits than its factorization.

18137556874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239400.

The product of its digits is 5644800, while the sum is 55.

The spelling of 18137556874 in words is "eighteen billion, one hundred thirty-seven million, five hundred fifty-six thousand, eight hundred seventy-four".