18400075040 has 24 divisors (see below), whose sum is σ = 43470177660. Its totient is φ = 7360029952.

The previous prime is 18400075027. The next prime is 18400075093. The reversal of 18400075040 is 4057000481.

It can be written as a sum of positive squares in 2 ways, for example, as 16487587216 + 1912487824 = 128404^2 + 43732^2 .

It is a super-2 number, since 2×18400075040² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18400074994 and 18400075012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57500075 + ... + 57500394.

Almost surely, 2^18400075040 is an apocalyptic number.

18400075040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18400075040 is an abundant number, since it is smaller than the sum of its proper divisors (25070102620).

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

18400075040 is a wasteful number, since it uses less digits than its factorization.

18400075040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115000484 (or 115000476 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The spelling of 18400075040 in words is "eighteen billion, four hundred million, seventy-five thousand, forty".