18628357968 has 200 divisors, whose sum is σ = 59286205440. Its totient is φ = 5599964160.

The previous prime is 18628357939. The next prime is 18628357999. The reversal of 18628357968 is 86975382681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1805368 + ... + 1815656.

Almost surely, 2^18628357968 is an apocalyptic number.

18628357968 is a gapful number since it is divisible by the number (18) 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 18628357968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29643102720).

18628357968 is an abundant number, since it is smaller than the sum of its proper divisors (40657847472).

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

18628357968 is a wasteful number, since it uses less digits than its factorization.

18628357968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10447 (or 10432 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 18628357968 in words is "eighteen billion, six hundred twenty-eight million, three hundred fifty-seven thousand, nine hundred sixty-eight".