18774517460 has 144 divisors (see below), whose sum is σ = 43329287232. Its totient is φ = 6808965120.

The previous prime is 18774517459. The next prime is 18774517523. The reversal of 18774517460 is 6471547781.

It is a junction number, because it is equal to n+sod(n) for n = 18774517399 and 18774517408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61154627 + ... + 61154933.

It is an arithmetic number, because the mean of its divisors is an integer number (300897828).

Almost surely, 2^18774517460 is an apocalyptic number.

18774517460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18774517460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21664643616).

18774517460 is an abundant number, since it is smaller than the sum of its proper divisors (24554769772).

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

18774517460 is a wasteful number, since it uses less digits than its factorization.

18774517460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 50.

The spelling of 18774517460 in words is "eighteen billion, seven hundred seventy-four million, five hundred seventeen thousand, four hundred sixty".