18089394120 has 128 divisors (see below), whose sum is σ = 68912006400. Its totient is φ = 4134716928.

The previous prime is 18089394109. The next prime is 18089394121. The reversal of 18089394120 is 2149398081.

18089394120 is a `hidden beast` number, since 180 + 89 + 394 + 1 + 2 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (18089394121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1188829 + ... + 1203948.

It is an arithmetic number, because the mean of its divisors is an integer number (538375050).

Almost surely, 2^18089394120 is an apocalyptic number.

18089394120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18089394120 is an abundant number, since it is smaller than the sum of its proper divisors (50822612280).

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

18089394120 is a wasteful number, since it uses less digits than its factorization.

18089394120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392804 (or 2392794 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 18089394120 in words is "eighteen billion, eighty-nine million, three hundred ninety-four thousand, one hundred twenty".