18122860 has 24 divisors (see below), whose sum is σ = 43495200. Its totient is φ = 6213504.

The previous prime is 18122851. The next prime is 18122887. The reversal of 18122860 is 6822181.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64585 + ... + 64864.

It is an arithmetic number, because the mean of its divisors is an integer number (1812300).

Almost surely, 2^18122860 is an apocalyptic number.

18122860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18122860 is an abundant number, since it is smaller than the sum of its proper divisors (25372340).

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

18122860 is a wasteful number, since it uses less digits than its factorization.

18122860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129465 (or 129463 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 18122860 is about 4257.0952538086. The cubic root of 18122860 is about 262.6690551230.

The spelling of 18122860 in words is "eighteen million, one hundred twenty-two thousand, eight hundred sixty".