18045590 has 8 divisors (see below), whose sum is σ = 32482080. Its totient is φ = 7218232.

The previous prime is 18045571. The next prime is 18045607. The reversal of 18045590 is 9554081.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902270 + ... + 902289.

It is an arithmetic number, because the mean of its divisors is an integer number (4060260).

Almost surely, 2^18045590 is an apocalyptic number.

18045590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18045590 is a deficient number, since it is larger than the sum of its proper divisors (14436490).

18045590 is a wasteful number, since it uses less digits than its factorization.

18045590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804566.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 18045590 is about 4248.0101223985. The cubic root of 18045590 is about 262.2952114026.

The spelling of 18045590 in words is "eighteen million, forty-five thousand, five hundred ninety".