18339956 has 12 divisors (see below), whose sum is σ = 32878020. Its totient is φ = 8946240.

The previous prime is 18339913. The next prime is 18340019. The reversal of 18339956 is 65993381.

It can be written as a sum of positive squares in 2 ways, for example, as 7344100 + 10995856 = 2710^2 + 3316^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55751 + ... + 56078.

It is an arithmetic number, because the mean of its divisors is an integer number (2739835).

Almost surely, 2^18339956 is an apocalyptic number.

It is an amenable number.

18339956 is a deficient number, since it is larger than the sum of its proper divisors (14538064).

18339956 is a wasteful number, since it uses less digits than its factorization.

18339956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111874 (or 111872 counting only the distinct ones).

The product of its digits is 174960, while the sum is 44.

The square root of 18339956 is about 4282.5174839106. The cubic root of 18339956 is about 263.7137431350.

The spelling of 18339956 in words is "eighteen million, three hundred thirty-nine thousand, nine hundred fifty-six".