18890318 has 8 divisors (see below), whose sum is σ = 28376040. Its totient is φ = 9431640.

The previous prime is 18890317. The next prime is 18890329. The reversal of 18890318 is 81309881.

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

It is a super-2 number, since 2×18890318² = 713688228282248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18890317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4913 + ... + 7868.

It is an arithmetic number, because the mean of its divisors is an integer number (3547005).

Almost surely, 2^18890318 is an apocalyptic number.

18890318 is a deficient number, since it is larger than the sum of its proper divisors (9485722).

18890318 is a wasteful number, since it uses less digits than its factorization.

18890318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13522.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 18890318 is about 4346.2993454202. The cubic root of 18890318 is about 266.3257076396.

The spelling of 18890318 in words is "eighteen million, eight hundred ninety thousand, three hundred eighteen".