18321930540040 has 32 divisors (see below), whose sum is σ = 41236255134360. Its totient is φ = 7326654630400.

The previous prime is 18321930540029. The next prime is 18321930540077. The reversal of 18321930540040 is 4004503912381.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11839641410884 + 6482289129156 = 3440878^2 + 2546034^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 18321930539975 and 18321930540002.

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, 66034381 + ... + 66311260.

Almost surely, 2^{18321930540040} is an apocalyptic number.

18321930540040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18321930540040 is an abundant number, since it is smaller than the sum of its proper divisors (22914324594320).

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

18321930540040 is a wasteful number, since it uses less digits than its factorization.

18321930540040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132349113 (or 132349109 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 18321930540040 in words is "eighteen trillion, three hundred twenty-one billion, nine hundred thirty million, five hundred forty thousand, forty".