18968888 has 8 divisors (see below), whose sum is σ = 35566680. Its totient is φ = 9484440.

The previous prime is 18968881. The next prime is 18968909. The reversal of 18968888 is 88886981.

It is a tau number, because it is divible by the number of its divisors (8).

18968888 is a modest number, since divided by 8888 gives 1896 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18968881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1185548 + ... + 1185563.

It is an arithmetic number, because the mean of its divisors is an integer number (4445835).

Almost surely, 2^18968888 is an apocalyptic number.

It is an amenable number.

18968888 is a deficient number, since it is larger than the sum of its proper divisors (16597792).

18968888 is a wasteful number, since it uses less digits than its factorization.

18968888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371117 (or 2371113 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 56.

The square root of 18968888 is about 4355.3286902368. The cubic root of 18968888 is about 266.6944373856.

The spelling of 18968888 in words is "eighteen million, nine hundred sixty-eight thousand, eight hundred eighty-eight".