18874868 has 12 divisors (see below), whose sum is σ = 33093060. Its totient is φ = 9419712.

The previous prime is 18874859. The next prime is 18874897. The reversal of 18874868 is 86847881.

It can be written as a sum of positive squares in 2 ways, for example, as 3602404 + 15272464 = 1898^2 + 3908^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1871 + ... + 6422.

It is an arithmetic number, because the mean of its divisors is an integer number (2757755).

Almost surely, 2^18874868 is an apocalyptic number.

It is an amenable number.

18874868 is a deficient number, since it is larger than the sum of its proper divisors (14218192).

18874868 is a wasteful number, since it uses less digits than its factorization.

18874868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8866 (or 8864 counting only the distinct ones).

The product of its digits is 688128, while the sum is 50.

The square root of 18874868 is about 4344.5216077262. The cubic root of 18874868 is about 266.2530804084.

The spelling of 18874868 in words is "eighteen million, eight hundred seventy-four thousand, eight hundred sixty-eight".