18693295056 has 120 divisors (see below), whose sum is σ = 53889108416. Its totient is φ = 6045580800.

The previous prime is 18693295051. The next prime is 18693295087. The reversal of 18693295056 is 65059239681.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18693294993 and 18693295011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18693295051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 924996 + ... + 944988.

Almost surely, 2^18693295056 is an apocalyptic number.

18693295056 is a gapful number since it is divisible by the number (16) 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 18693295056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26944554208).

18693295056 is an abundant number, since it is smaller than the sum of its proper divisors (35195813360).

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

18693295056 is a wasteful number, since it uses less digits than its factorization.

18693295056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20201 (or 20192 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 18693295056 in words is "eighteen billion, six hundred ninety-three million, two hundred ninety-five thousand, fifty-six".