18689130 has 48 divisors (see below), whose sum is σ = 50397984. Its totient is φ = 4983120.

The previous prime is 18689093. The next prime is 18689131. The reversal of 18689130 is 3198681.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18689131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1416 + ... + 6275.

It is an arithmetic number, because the mean of its divisors is an integer number (1049958).

Almost surely, 2^18689130 is an apocalyptic number.

18689130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18689130 is an abundant number, since it is smaller than the sum of its proper divisors (31708854).

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

18689130 is an equidigital number, since it uses as much as digits as its factorization.

18689130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7713 (or 7701 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 18689130 is about 4323.0926430045. The cubic root of 18689130 is about 265.3768460718.

The spelling of 18689130 in words is "eighteen million, six hundred eighty-nine thousand, one hundred thirty".