18089188530 has 128 divisors (see below), whose sum is σ = 50391244800. Its totient is φ = 4070386944.

The previous prime is 18089188517. The next prime is 18089188547. The reversal of 18089188530 is 3588198081.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6452109 + ... + 6454911.

It is an arithmetic number, because the mean of its divisors is an integer number (393681600).

Almost surely, 2^18089188530 is an apocalyptic number.

18089188530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18089188530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25195622400).

18089188530 is an abundant number, since it is smaller than the sum of its proper divisors (32302056270).

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

18089188530 is a wasteful number, since it uses less digits than its factorization.

18089188530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3288.

The product of its (nonzero) digits is 552960, while the sum is 51.

The spelling of 18089188530 in words is "eighteen billion, eighty-nine million, one hundred eighty-eight thousand, five hundred thirty".