18514908831 has 8 divisors (see below), whose sum is σ = 24797248000. Its totient is φ = 12287921112.

The previous prime is 18514908809. The next prime is 18514908869. The reversal of 18514908831 is 13880941581.

It is a happy number.

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

It is not a de Polignac number, because 18514908831 - 2⁹ = 18514908319 is a prime.

It is a super-2 number, since 2×18514908831² (a number of 21 digits) contains 22 as substring.

It is the 136070-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18514908031) by changing a digit.

It is a nontrivial repunit in base 136069.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13837081 + ... + 13838418.

It is an arithmetic number, because the mean of its divisors is an integer number (3099656000).

Almost surely, 2^18514908831 is an apocalyptic number.

18514908831 is a deficient number, since it is larger than the sum of its proper divisors (6282339169).

18514908831 is a wasteful number, since it uses less digits than its factorization.

18514908831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27675725.

The product of its (nonzero) digits is 276480, while the sum is 48.

The spelling of 18514908831 in words is "eighteen billion, five hundred fourteen million, nine hundred eight thousand, eight hundred thirty-one".