18389708 has 6 divisors (see below), whose sum is σ = 32181996. Its totient is φ = 9194852.

The previous prime is 18389687. The next prime is 18389713. The reversal of 18389708 is 80798381.

It is a plaindrome in base 16.

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, 2298710 + ... + 2298717.

It is an arithmetic number, because the mean of its divisors is an integer number (5363666).

Almost surely, 2^18389708 is an apocalyptic number.

It is an amenable number.

18389708 is a deficient number, since it is larger than the sum of its proper divisors (13792288).

18389708 is a wasteful number, since it uses less digits than its factorization.

18389708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4597431 (or 4597429 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 18389708 is about 4288.3222826649. The cubic root of 18389708 is about 263.9519923418.

The spelling of 18389708 in words is "eighteen million, three hundred eighty-nine thousand, seven hundred eight".