18380474 has 8 divisors (see below), whose sum is σ = 31509408. Its totient is φ = 7877340.

The previous prime is 18380471. The next prime is 18380497. The reversal of 18380474 is 47408381.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (18380471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656432 + ... + 656459.

It is an arithmetic number, because the mean of its divisors is an integer number (3938676).

Almost surely, 2^18380474 is an apocalyptic number.

18380474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18380474 is a deficient number, since it is larger than the sum of its proper divisors (13128934).

18380474 is a wasteful number, since it uses less digits than its factorization.

18380474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312900.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 18380474 is about 4287.2455026509. The cubic root of 18380474 is about 263.9078056557.

The spelling of 18380474 in words is "eighteen million, three hundred eighty thousand, four hundred seventy-four".