18959340 has 48 divisors (see below), whose sum is σ = 55883520. Its totient is φ = 4789440.

The previous prime is 18959333. The next prime is 18959357. The reversal of 18959340 is 4395981.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7176 + ... + 9455.

It is an arithmetic number, because the mean of its divisors is an integer number (1164240).

Almost surely, 2^18959340 is an apocalyptic number.

18959340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18959340 is an abundant number, since it is smaller than the sum of its proper divisors (36924180).

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

18959340 is a wasteful number, since it uses less digits than its factorization.

18959340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16662 (or 16660 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 18959340 is about 4354.2324237459. The cubic root of 18959340 is about 266.6496829461.

The spelling of 18959340 in words is "eighteen million, nine hundred fifty-nine thousand, three hundred forty".