18408332 has 6 divisors (see below), whose sum is σ = 32214588. Its totient is φ = 9204164.

The previous prime is 18408329. The next prime is 18408347. The reversal of 18408332 is 23380481.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18408295 and 18408304.

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 as a sum of consecutive naturals, namely, 2301038 + ... + 2301045.

It is an arithmetic number, because the mean of its divisors is an integer number (5369098).

Almost surely, 2^18408332 is an apocalyptic number.

It is an amenable number.

18408332 is a deficient number, since it is larger than the sum of its proper divisors (13806256).

18408332 is a wasteful number, since it uses less digits than its factorization.

18408332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4602087 (or 4602085 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 18408332 is about 4290.4932117415. The cubic root of 18408332 is about 264.0410672263.

The spelling of 18408332 in words is "eighteen million, four hundred eight thousand, three hundred thirty-two".