18500691130 has 16 divisors (see below), whose sum is σ = 33304419720. Its totient is φ = 7399570752.

The previous prime is 18500691109. The next prime is 18500691277. The reversal of 18500691130 is 3119600581.

It can be written as a sum of positive squares in 4 ways, for example, as 10409508729 + 8091182401 = 102027^2 + 89951^2 .

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 7 ways as a sum of consecutive naturals, for example, 29356 + ... + 194584.

Almost surely, 2^18500691130 is an apocalyptic number.

18500691130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18500691130 is a deficient number, since it is larger than the sum of its proper divisors (14803728590).

18500691130 is a wasteful number, since it uses less digits than its factorization.

18500691130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176433.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 18500691130 in words is "eighteen billion, five hundred million, six hundred ninety-one thousand, one hundred thirty".