18321748 has 12 divisors (see below), whose sum is σ = 32394292. Its totient is φ = 9066240.

The previous prime is 18321739. The next prime is 18321761. The reversal of 18321748 is 84712381.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5846724 + 12475024 = 2418^2 + 3532^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 23223 + ... + 23998.

Almost surely, 2^18321748 is an apocalyptic number.

It is an amenable number.

18321748 is a deficient number, since it is larger than the sum of its proper divisors (14072544).

18321748 is a wasteful number, since it uses less digits than its factorization.

18321748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47322 (or 47320 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 18321748 is about 4280.3911036259. The cubic root of 18321748 is about 263.6264421301.

The spelling of 18321748 in words is "eighteen million, three hundred twenty-one thousand, seven hundred forty-eight".