18380452 has 12 divisors (see below), whose sum is σ = 32461660. Its totient is φ = 9105696.

The previous prime is 18380449. The next prime is 18380471. The reversal of 18380452 is 25408381.

It can be written as a sum of positive squares in 2 ways, for example, as 7986276 + 10394176 = 2826^2 + 3224^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 20643 + ... + 21514.

Almost surely, 2^18380452 is an apocalyptic number.

It is an amenable number.

18380452 is a deficient number, since it is larger than the sum of its proper divisors (14081208).

18380452 is a wasteful number, since it uses less digits than its factorization.

18380452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42270 (or 42268 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 18380452 is about 4287.2429369001. The cubic root of 18380452 is about 263.9077003633.

The spelling of 18380452 in words is "eighteen million, three hundred eighty thousand, four hundred fifty-two".