18131708 has 24 divisors (see below), whose sum is σ = 36621312. Its totient is φ = 7694064.

The previous prime is 18131651. The next prime is 18131713. The reversal of 18131708 is 80713181.

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 7 ways as a sum of consecutive naturals, for example, 260 + ... + 6027.

It is an arithmetic number, because the mean of its divisors is an integer number (1525888).

Almost surely, 2^18131708 is an apocalyptic number.

It is an amenable number.

18131708 is an abundant number, since it is smaller than the sum of its proper divisors (18489604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18131708 is a wasteful number, since it uses less digits than its factorization.

18131708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6401 (or 6399 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 18131708 is about 4258.1343332497. The cubic root of 18131708 is about 262.7117952070.

Adding to 18131708 its reverse (80713181), we get a palindrome (98844889).

The spelling of 18131708 in words is "eighteen million, one hundred thirty-one thousand, seven hundred eight".