18807120 has 80 divisors (see below), whose sum is σ = 64787520. Its totient is φ = 5014656.

The previous prime is 18807091. The next prime is 18807121. The reversal of 18807120 is 2170881.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18807121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2194 + ... + 6513.

It is an arithmetic number, because the mean of its divisors is an integer number (809844).

Almost surely, 2^18807120 is an apocalyptic number.

18807120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18807120 is an abundant number, since it is smaller than the sum of its proper divisors (45980400).

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

18807120 is a wasteful number, since it uses less digits than its factorization.

18807120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8729 (or 8717 counting only the distinct ones).

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

The square root of 18807120 is about 4336.7176527876. The cubic root of 18807120 is about 265.9341424010.

The spelling of 18807120 in words is "eighteen million, eight hundred seven thousand, one hundred twenty".