18380464 has 20 divisors (see below), whose sum is σ = 36482040. Its totient is φ = 8965760.

The previous prime is 18380449. The next prime is 18380471. The reversal of 18380464 is 46408381.

It is an unprimeable number.

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, 13354 + ... + 14665.

It is an arithmetic number, because the mean of its divisors is an integer number (1824102).

Almost surely, 2^18380464 is an apocalyptic number.

It is an amenable number.

18380464 is a deficient number, since it is larger than the sum of its proper divisors (18101576).

18380464 is a wasteful number, since it uses less digits than its factorization.

18380464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28068 (or 28062 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 18380464 is about 4287.2443364007. The cubic root of 18380464 is about 263.9077577955.

The spelling of 18380464 in words is "eighteen million, three hundred eighty thousand, four hundred sixty-four".