18885759768 has 88 divisors (see below), whose sum is σ = 53117228100. Its totient is φ = 6295095792.

The previous prime is 18885759751. The next prime is 18885759769. The reversal of 18885759768 is 86795758881.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 18885759696 and 18885759705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18885759769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 452403 + ... + 492381.

Almost surely, 2^18885759768 is an apocalyptic number.

18885759768 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 18885759768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26558614050).

18885759768 is an abundant number, since it is smaller than the sum of its proper divisors (34231468332).

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

18885759768 is an frugal number, since it uses more digits than its factorization.

18885759768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40015 (or 39984 counting only the distinct ones).

The product of its digits is 270950400, while the sum is 72.

The spelling of 18885759768 in words is "eighteen billion, eight hundred eighty-five million, seven hundred fifty-nine thousand, seven hundred sixty-eight".