18572745840 has 160 divisors (see below), whose sum is σ = 63014395392. Its totient is φ = 4487808000.

The previous prime is 18572745833. The next prime is 18572745857. The reversal of 18572745840 is 4854727581.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 809730 + ... + 832350.

Almost surely, 2^18572745840 is an apocalyptic number.

18572745840 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 18572745840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31507197696).

18572745840 is an abundant number, since it is smaller than the sum of its proper divisors (44441649552).

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

18572745840 is a wasteful number, since it uses less digits than its factorization.

18572745840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22959 (or 22953 counting only the distinct ones).

The product of its (nonzero) digits is 2508800, while the sum is 51.

The spelling of 18572745840 in words is "eighteen billion, five hundred seventy-two million, seven hundred forty-five thousand, eight hundred forty".