18380894 has 8 divisors (see below), whose sum is σ = 31510128. Its totient is φ = 7877520.

The previous prime is 18380881. The next prime is 18380899. The reversal of 18380894 is 49808381.

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

It is a super-3 number, since 3×18380894³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18380899) 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, 656447 + ... + 656474.

It is an arithmetic number, because the mean of its divisors is an integer number (3938766).

Almost surely, 2^18380894 is an apocalyptic number.

18380894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18380894 is a deficient number, since it is larger than the sum of its proper divisors (13129234).

18380894 is a wasteful number, since it uses less digits than its factorization.

18380894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312930.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 18380894 is about 4287.2944848704. The cubic root of 18380894 is about 263.9098157677.

The spelling of 18380894 in words is "eighteen million, three hundred eighty thousand, eight hundred ninety-four".