18018190 has 8 divisors (see below), whose sum is σ = 32432760. Its totient is φ = 7207272.

The previous prime is 18018173. The next prime is 18018191. The reversal of 18018190 is 9181081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18018190² = 649310341752200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18018191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900900 + ... + 900919.

It is an arithmetic number, because the mean of its divisors is an integer number (4054095).

Almost surely, 2^18018190 is an apocalyptic number.

18018190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18018190 is a deficient number, since it is larger than the sum of its proper divisors (14414570).

18018190 is a wasteful number, since it uses less digits than its factorization.

18018190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801826.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 18018190 is about 4244.7838578660. The cubic root of 18018190 is about 262.1623898594.

The spelling of 18018190 in words is "eighteen million, eighteen thousand, one hundred ninety".