18144660 has 24 divisors (see below), whose sum is σ = 50805216. Its totient is φ = 4838560.

The previous prime is 18144619. The next prime is 18144701. The reversal of 18144660 is 6644181.

It is an interprime number because it is at equal distance from previous prime (18144619) and next prime (18144701).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 151146 + ... + 151265.

It is an arithmetic number, because the mean of its divisors is an integer number (2116884).

Almost surely, 2^18144660 is an apocalyptic number.

18144660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18144660 is an abundant number, since it is smaller than the sum of its proper divisors (32660556).

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

18144660 is a wasteful number, since it uses less digits than its factorization.

18144660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302423 (or 302421 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18144660 is about 4259.6549156006. The cubic root of 18144660 is about 262.7743345127.

The spelling of 18144660 in words is "eighteen million, one hundred forty-four thousand, six hundred sixty".