18935808 has 104 divisors (see below), whose sum is σ = 53470848. Its totient is φ = 5947392.

The previous prime is 18935789. The next prime is 18935821. The reversal of 18935808 is 80853981.

It is a super-2 number, since 2×18935808² = 717129649225728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18935808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282591 + ... + 282657.

Almost surely, 2^18935808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18935808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26735424).

18935808 is an abundant number, since it is smaller than the sum of its proper divisors (34535040).

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

18935808 is an equidigital number, since it uses as much as digits as its factorization.

18935808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 18935808 is about 4351.5293863193. The cubic root of 18935808 is about 266.5393169702.

The spelling of 18935808 in words is "eighteen million, nine hundred thirty-five thousand, eight hundred eight".