18628792320 has 208 divisors, whose sum is σ = 59951829312. Its totient is φ = 4938792960.

The previous prime is 18628792309. The next prime is 18628792363. The reversal of 18628792320 is 2329782681.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 18628792320.

It is a congruent number.

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, 11857135 + ... + 11858705.

Almost surely, 2^18628792320 is an apocalyptic number.

18628792320 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 18628792320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29975914656).

18628792320 is an abundant number, since it is smaller than the sum of its proper divisors (41323036992).

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

18628792320 is a wasteful number, since it uses less digits than its factorization.

18628792320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796 (or 1774 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 18628792320 in words is "eighteen billion, six hundred twenty-eight million, seven hundred ninety-two thousand, three hundred twenty".