18089159400 has 576 divisors, whose sum is σ = 71200911600. Its totient is φ = 4074209280.

The previous prime is 18089159381. The next prime is 18089159411. The reversal of 18089159400 is 495198081.

18089159400 is a `hidden beast` number, since 18 + 0 + 89 + 159 + 400 = 666.

It can be written as a sum of positive squares in 24 ways, for example, as 2410613604 + 15678545796 = 49098^2 + 125214^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 14717986 + ... + 14719214.

Almost surely, 2^18089159400 is an apocalyptic number.

18089159400 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 18089159400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35600455800).

18089159400 is an abundant number, since it is smaller than the sum of its proper divisors (53111752200).

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

18089159400 is a wasteful number, since it uses less digits than its factorization.

18089159400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318 (or 1306 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The spelling of 18089159400 in words is "eighteen billion, eighty-nine million, one hundred fifty-nine thousand, four hundred".