18107820 has 48 divisors (see below), whose sum is σ = 56337120. Its totient is φ = 4828608.

The previous prime is 18107801. The next prime is 18107849. The reversal of 18107820 is 2870181.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 in 15 ways as a sum of consecutive naturals, for example, 16227 + ... + 17306.

It is an arithmetic number, because the mean of its divisors is an integer number (1173690).

Almost surely, 2^18107820 is an apocalyptic number.

18107820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18107820 is an abundant number, since it is smaller than the sum of its proper divisors (38229300).

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

18107820 is a wasteful number, since it uses less digits than its factorization.

18107820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33551 (or 33543 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 18107820 is about 4255.3284244580. The cubic root of 18107820 is about 262.5963727772.

The spelling of 18107820 in words is "eighteen million, one hundred seven thousand, eight hundred twenty".