18160000 has 80 divisors (see below), whose sum is σ = 45407340. Its totient is φ = 7232000.

The previous prime is 18159989. The next prime is 18160013. The reversal of 18160000 is 6181.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 79887 + ... + 80113.

Almost surely, 2^18160000 is an apocalyptic number.

18160000 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 18160000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22703670).

18160000 is an abundant number, since it is smaller than the sum of its proper divisors (27247340).

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

18160000 is an frugal number, since it uses more digits than its factorization.

18160000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 18160000 is about 4261.4551505325. The cubic root of 18160000 is about 262.8483658965.

Adding to 18160000 its reverse (6181), we get a palindrome (18166181).

The spelling of 18160000 in words is "eighteen million, one hundred sixty thousand".