18956898288 has 160 divisors (see below), whose sum is σ = 59473336320. Its totient is φ = 5755345920.

The previous prime is 18956898251. The next prime is 18956898307. The reversal of 18956898288 is 88289865981.

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

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, 186031 + ... + 269297.

It is an arithmetic number, because the mean of its divisors is an integer number (371708352).

Almost surely, 2^18956898288 is an apocalyptic number.

18956898288 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 18956898288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29736668160).

18956898288 is an abundant number, since it is smaller than the sum of its proper divisors (40516438032).

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

18956898288 is a wasteful number, since it uses less digits than its factorization.

18956898288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83332 (or 83320 counting only the distinct ones).

The product of its digits is 159252480, while the sum is 72.

The spelling of 18956898288 in words is "eighteen billion, nine hundred fifty-six million, eight hundred ninety-eight thousand, two hundred eighty-eight".