18730494720 has 432 divisors, whose sum is σ = 74384593920. Its totient is φ = 4262731776.

The previous prime is 18730494703. The next prime is 18730494749. The reversal of 18730494720 is 2749403781.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28949437 + ... + 28950083.

It is an arithmetic number, because the mean of its divisors is an integer number (172186560).

Almost surely, 2^18730494720 is an apocalyptic number.

18730494720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18730494720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37192296960).

18730494720 is an abundant number, since it is smaller than the sum of its proper divisors (55654099200).

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

18730494720 is a wasteful number, since it uses less digits than its factorization.

18730494720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040 (or 1023 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 18730494720 in words is "eighteen billion, seven hundred thirty million, four hundred ninety-four thousand, seven hundred twenty".