18945708 has 12 divisors (see below), whose sum is σ = 44206680. Its totient is φ = 6315232.

The previous prime is 18945691. The next prime is 18945727. The reversal of 18945708 is 80754981.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 18945708.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789393 + ... + 789416.

It is an arithmetic number, because the mean of its divisors is an integer number (3683890).

Almost surely, 2^18945708 is an apocalyptic number.

It is an amenable number.

18945708 is an abundant number, since it is smaller than the sum of its proper divisors (25260972).

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

18945708 is a wasteful number, since it uses less digits than its factorization.

18945708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578816 (or 1578814 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 18945708 is about 4352.6667687752. Note that the first 3 decimals coincide. The cubic root of 18945708 is about 266.5857594829.

The spelling of 18945708 in words is "eighteen million, nine hundred forty-five thousand, seven hundred eight".