18869768 has 8 divisors (see below), whose sum is σ = 35380830. Its totient is φ = 9434880.

The previous prime is 18869761. The next prime is 18869783. The reversal of 18869768 is 86796881.

It can be written as a sum of positive squares in only one way, i.e., 17825284 + 1044484 = 4222^2 + 1022^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18869761) by changing a digit.

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 as a sum of consecutive naturals, namely, 1179353 + ... + 1179368.

Almost surely, 2^18869768 is an apocalyptic number.

It is an amenable number.

18869768 is a deficient number, since it is larger than the sum of its proper divisors (16511062).

18869768 is a wasteful number, since it uses less digits than its factorization.

18869768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2358727 (or 2358723 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 53.

The square root of 18869768 is about 4343.9346219758. The cubic root of 18869768 is about 266.2290976706.

The spelling of 18869768 in words is "eighteen million, eight hundred sixty-nine thousand, seven hundred sixty-eight".