18231380495039 has 8 divisors (see below), whose sum is σ = 19335000137040. Its totient is φ = 17131225908096.

The previous prime is 18231380495033. The next prime is 18231380495051. The reversal of 18231380495039 is 93059408313281.

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 18231380495039 - 2²⁸ = 18231112059583 is a prime.

It is a super-2 number, since 2×18231380495039² (a number of 27 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 (18231380495033) 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, 866252924 + ... + 866273969.

It is an arithmetic number, because the mean of its divisors is an integer number (2416875017130).

Almost surely, 2^{18231380495039} is an apocalyptic number.

18231380495039 is a deficient number, since it is larger than the sum of its proper divisors (1103619642001).

18231380495039 is a wasteful number, since it uses less digits than its factorization.

18231380495039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732527529.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 18231380495039 in words is "eighteen trillion, two hundred thirty-one billion, three hundred eighty million, four hundred ninety-five thousand, thirty-nine".