18290616720 has 80 divisors (see below), whose sum is σ = 57499569792. Its totient is φ = 4808796160.

The previous prime is 18290616677. The next prime is 18290616739. The reversal of 18290616720 is 2761609281.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519657 + ... + 553736.

Almost surely, 2^18290616720 is an apocalyptic number.

18290616720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18290616720 is an abundant number, since it is smaller than the sum of its proper divisors (39208953072).

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

18290616720 is a wasteful number, since it uses less digits than its factorization.

18290616720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073480 (or 1073474 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 18290616720 in words is "eighteen billion, two hundred ninety million, six hundred sixteen thousand, seven hundred twenty".