18305500437440 has 56 divisors (see below), whose sum is σ = 43933201147392. Its totient is φ = 7264545039360.

The previous prime is 18305500437407. The next prime is 18305500437463. The reversal of 18305500437440 is 4473400550381.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18305500437391 and 18305500437400.

It is a congruent number.

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, 225174671 + ... + 225255950.

Almost surely, 2^{18305500437440} is an apocalyptic number.

18305500437440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18305500437440 is an abundant number, since it is smaller than the sum of its proper divisors (25627700709952).

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

18305500437440 is a wasteful number, since it uses less digits than its factorization.

18305500437440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450430765 (or 450430755 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 18305500437440 in words is "eighteen trillion, three hundred five billion, five hundred million, four hundred thirty-seven thousand, four hundred forty".