18959660 has 24 divisors (see below), whose sum is σ = 40412400. Its totient is φ = 7470144.

The previous prime is 18959653. The next prime is 18959669. The reversal of 18959660 is 6695981.

It is not an unprimeable number, because it can be changed into a prime (18959669) 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, 5735 + ... + 8414.

It is an arithmetic number, because the mean of its divisors is an integer number (1683850).

Almost surely, 2^18959660 is an apocalyptic number.

18959660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18959660 is an abundant number, since it is smaller than the sum of its proper divisors (21452740).

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

18959660 is a wasteful number, since it uses less digits than its factorization.

18959660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14225 (or 14223 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 18959660 is about 4354.2691694474. The cubic root of 18959660 is about 266.6511831288.

The spelling of 18959660 in words is "eighteen million, nine hundred fifty-nine thousand, six hundred sixty".