18137742187 has 8 divisors (see below), whose sum is σ = 19224342576. Its totient is φ = 17053327872.

The previous prime is 18137742179. The next prime is 18137742193. The reversal of 18137742187 is 78124773181.

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

It is a cyclic number.

It is not a de Polignac number, because 18137742187 - 2³ = 18137742179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18137742187.

It is not an unprimeable number, because it can be changed into a prime (18137742127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529413 + ... + 562630.

It is an arithmetic number, because the mean of its divisors is an integer number (2403042822).

Almost surely, 2^18137742187 is an apocalyptic number.

18137742187 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18137742187 is a deficient number, since it is larger than the sum of its proper divisors (1086600389).

18137742187 is a wasteful number, since it uses less digits than its factorization.

18137742187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093037.

The product of its digits is 526848, while the sum is 49.

The spelling of 18137742187 in words is "eighteen billion, one hundred thirty-seven million, seven hundred forty-two thousand, one hundred eighty-seven".