18631414540 has 24 divisors (see below), whose sum is σ = 39216768192. Its totient is φ = 7435271040.

The previous prime is 18631414531. The next prime is 18631414541. The reversal of 18631414540 is 4541413681.

It is a super-2 number, since 2×18631414540² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18631414540.

It is not an unprimeable number, because it can be changed into a prime (18631414541) 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, 1072089 + ... + 1089328.

It is an arithmetic number, because the mean of its divisors is an integer number (1634032008).

Almost surely, 2^18631414540 is an apocalyptic number.

18631414540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18631414540 is an abundant number, since it is smaller than the sum of its proper divisors (20585353652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18631414540 is a wasteful number, since it uses less digits than its factorization.

18631414540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161857 (or 2161855 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

It can be divided in two parts, 1863141 and 4540, that added together give a palindrome (1867681).

The spelling of 18631414540 in words is "eighteen billion, six hundred thirty-one million, four hundred fourteen thousand, five hundred forty".