18065890080 has 960 divisors, whose sum is σ = 78683996160. Its totient is φ = 3811608576.

The previous prime is 18065890079. The next prime is 18065890091. The reversal of 18065890080 is 8009856081.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 159 ways as a sum of consecutive naturals, for example, 81012849 + ... + 81013071.

It is an arithmetic number, because the mean of its divisors is an integer number (81962496).

Almost surely, 2^18065890080 is an apocalyptic number.

18065890080 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 18065890080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39341998080).

18065890080 is an abundant number, since it is smaller than the sum of its proper divisors (60618106080).

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

18065890080 is a wasteful number, since it uses less digits than its factorization.

18065890080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 18065890080 in words is "eighteen billion, sixty-five million, eight hundred ninety thousand, eighty".