18345680240 has 20 divisors (see below), whose sum is σ = 42653706744. Its totient is φ = 7338272064.

The previous prime is 18345680219. The next prime is 18345680251. The reversal of 18345680240 is 4208654381.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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, 114660422 + ... + 114660581.

Almost surely, 2^18345680240 is an apocalyptic number.

18345680240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18345680240 is an abundant number, since it is smaller than the sum of its proper divisors (24308026504).

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

18345680240 is a wasteful number, since it uses less digits than its factorization.

18345680240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229321016 (or 229321010 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 18345680240 in words is "eighteen billion, three hundred forty-five million, six hundred eighty thousand, two hundred forty".