18968895 has 24 divisors (see below), whose sum is σ = 35869392. Its totient is φ = 9196800.

The previous prime is 18968881. The next prime is 18968909. The reversal of 18968895 is 59886981.

It is an interprime number because it is at equal distance from previous prime (18968881) and next prime (18968909).

It is not a de Polignac number, because 18968895 - 2²⁰ = 17920319 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18666 + ... + 19655.

It is an arithmetic number, because the mean of its divisors is an integer number (1494558).

Almost surely, 2^18968895 is an apocalyptic number.

18968895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18968895 is a deficient number, since it is larger than the sum of its proper divisors (16900497).

18968895 is a wasteful number, since it uses less digits than its factorization.

18968895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38343 (or 38340 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 18968895 is about 4355.3294938500. The cubic root of 18968895 is about 266.6944701913.

The spelling of 18968895 in words is "eighteen million, nine hundred sixty-eight thousand, eight hundred ninety-five".