18274712640 has 56 divisors (see below), whose sum is σ = 58022215680. Its totient is φ = 4873256448.

The previous prime is 18274712627. The next prime is 18274712653. The reversal of 18274712640 is 4621747281.

It is an interprime number because it is at equal distance from previous prime (18274712627) and next prime (18274712653).

It is a junction number, because it is equal to n+sod(n) for n = 18274712592 and 18274712601.

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, 9517120 + ... + 9519039.

Almost surely, 2^18274712640 is an apocalyptic number.

18274712640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18274712640 is an abundant number, since it is smaller than the sum of its proper divisors (39747503040).

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

18274712640 is a wasteful number, since it uses less digits than its factorization.

18274712640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19036179 (or 19036169 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 18274712640 in words is "eighteen billion, two hundred seventy-four million, seven hundred twelve thousand, six hundred forty".