18440717040 has 160 divisors (see below), whose sum is σ = 65567232000. Its totient is φ = 4758877440.

The previous prime is 18440717033. The next prime is 18440717059. The reversal of 18440717040 is 4071704481.

18440717040 is a `hidden beast` number, since 1 + 8 + 440 + 7 + 170 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18440716986 and 18440717004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70740 + ... + 204659.

It is an arithmetic number, because the mean of its divisors is an integer number (409795200).

Almost surely, 2^18440717040 is an apocalyptic number.

18440717040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18440717040 is an abundant number, since it is smaller than the sum of its proper divisors (47126514960).

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

18440717040 is a wasteful number, since it uses less digits than its factorization.

18440717040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275452 (or 275440 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The spelling of 18440717040 in words is "eighteen billion, four hundred forty million, seven hundred seventeen thousand, forty".