18678898 has 24 divisors (see below), whose sum is σ = 34013952. Its totient is φ = 7656264.

The previous prime is 18678889. The next prime is 18678917. The reversal of 18678898 is 89887681.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1890 + ... + 6397.

It is an arithmetic number, because the mean of its divisors is an integer number (1417248).

Almost surely, 2^18678898 is an apocalyptic number.

18678898 is a deficient number, since it is larger than the sum of its proper divisors (15335054).

18678898 is a wasteful number, since it uses less digits than its factorization.

18678898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8326 (or 8319 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 55.

The square root of 18678898 is about 4321.9090689185. The cubic root of 18678898 is about 265.3284073702.

The spelling of 18678898 in words is "eighteen million, six hundred seventy-eight thousand, eight hundred ninety-eight".