18680156 has 12 divisors (see below), whose sum is σ = 35662200. Its totient is φ = 8490960.

The previous prime is 18680149. The next prime is 18680159. The reversal of 18680156 is 65108681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680159) by changing a digit.

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, 212231 + ... + 212318.

It is an arithmetic number, because the mean of its divisors is an integer number (2971850).

Almost surely, 2^18680156 is an apocalyptic number.

It is an amenable number.

18680156 is a deficient number, since it is larger than the sum of its proper divisors (16982044).

18680156 is a wasteful number, since it uses less digits than its factorization.

18680156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424564 (or 424562 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 18680156 is about 4322.0546040049. The cubic root of 18680156 is about 265.3343637466.

The spelling of 18680156 in words is "eighteen million, six hundred eighty thousand, one hundred fifty-six".