18124780 has 24 divisors (see below), whose sum is σ = 38153808. Its totient is φ = 7232448.

The previous prime is 18124763. The next prime is 18124789. The reversal of 18124780 is 8742181.

It is not an unprimeable number, because it can be changed into a prime (18124789) 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 7 ways as a sum of consecutive naturals, for example, 10327 + ... + 11953.

It is an arithmetic number, because the mean of its divisors is an integer number (1589742).

Almost surely, 2^18124780 is an apocalyptic number.

18124780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18124780 is an abundant number, since it is smaller than the sum of its proper divisors (20029028).

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

18124780 is a wasteful number, since it uses less digits than its factorization.

18124780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2193 (or 2191 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 18124780 is about 4257.3207537135. The cubic root of 18124780 is about 262.6783308256.

The spelling of 18124780 in words is "eighteen million, one hundred twenty-four thousand, seven hundred eighty".