18449660 has 24 divisors (see below), whose sum is σ = 39238080. Its totient is φ = 7285824.

The previous prime is 18449603. The next prime is 18449663. The reversal of 18449660 is 6694481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18449663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4259 + ... + 7418.

It is an arithmetic number, because the mean of its divisors is an integer number (1634920).

Almost surely, 2^18449660 is an apocalyptic number.

18449660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18449660 is an abundant number, since it is smaller than the sum of its proper divisors (20788420).

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

18449660 is a wasteful number, since it uses less digits than its factorization.

18449660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11765 (or 11763 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 18449660 is about 4295.3067410838. The cubic root of 18449660 is about 264.2385164594.

The spelling of 18449660 in words is "eighteen million, four hundred forty-nine thousand, six hundred sixty".