18916514487460 has 24 divisors (see below), whose sum is σ = 39926328555960. Its totient is φ = 7528196626944.

The previous prime is 18916514487449. The next prime is 18916514487511. The reversal of 18916514487460 is 6478441561981.

It can be written as a sum of positive squares in 4 ways, for example, as 5106253128804 + 13810261358656 = 2259702^2 + 3716216^2 .

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18916514487392 and 18916514487401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2400568965 + ... + 2400576844.

It is an arithmetic number, because the mean of its divisors is an integer number (1663597023165).

Almost surely, 2^{18916514487460} is an apocalyptic number.

18916514487460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18916514487460 is an abundant number, since it is smaller than the sum of its proper divisors (21009814068500).

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

18916514487460 is a wasteful number, since it uses less digits than its factorization.

18916514487460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4801146015 (or 4801146013 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 64.

The spelling of 18916514487460 in words is "eighteen trillion, nine hundred sixteen billion, five hundred fourteen million, four hundred eighty-seven thousand, four hundred sixty".