18808885 has 8 divisors (see below), whose sum is σ = 23898456. Its totient is φ = 14161920.

The previous prime is 18808877. The next prime is 18808897. The reversal of 18808885 is 58880881.

It can be written as a sum of positive squares in 4 ways, for example, as 848241 + 17960644 = 921^2 + 4238^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18808885 - 2³ = 18808877 is a prime.

It is a Duffinian number.

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, 110556 + ... + 110725.

It is an arithmetic number, because the mean of its divisors is an integer number (2987307).

Almost surely, 2^18808885 is an apocalyptic number.

It is an amenable number.

18808885 is a deficient number, since it is larger than the sum of its proper divisors (5089571).

18808885 is a wasteful number, since it uses less digits than its factorization.

18808885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221303.

The product of its (nonzero) digits is 163840, while the sum is 46.

The square root of 18808885 is about 4336.9211429308. The cubic root of 18808885 is about 265.9424612200.

The spelling of 18808885 in words is "eighteen million, eight hundred eight thousand, eight hundred eighty-five".