18531214831 has 8 divisors (see below), whose sum is σ = 18641415744. Its totient is φ = 18421333920.

The previous prime is 18531214829. The next prime is 18531214901. The reversal of 18531214831 is 13841213581.

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 18531214831 - 2¹ = 18531214829 is a prime.

It is a super-2 number, since 2×18531214831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18531214811) by changing a digit.

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, 36666 + ... + 195976.

It is an arithmetic number, because the mean of its divisors is an integer number (2330176968).

Almost surely, 2^18531214831 is an apocalyptic number.

18531214831 is a deficient number, since it is larger than the sum of its proper divisors (110200913).

18531214831 is a wasteful number, since it uses less digits than its factorization.

18531214831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160001.

The product of its digits is 23040, while the sum is 37.

The spelling of 18531214831 in words is "eighteen billion, five hundred thirty-one million, two hundred fourteen thousand, eight hundred thirty-one".