18899426 has 16 divisors (see below), whose sum is σ = 34891584. Its totient is φ = 7476624.

The previous prime is 18899381. The next prime is 18899449. The reversal of 18899426 is 62499881.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51740 + ... + 52103.

It is an arithmetic number, because the mean of its divisors is an integer number (2180724).

Almost surely, 2^18899426 is an apocalyptic number.

18899426 is a deficient number, since it is larger than the sum of its proper divisors (15992158).

18899426 is a wasteful number, since it uses less digits than its factorization.

18899426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103865.

The product of its digits is 248832, while the sum is 47.

The square root of 18899426 is about 4347.3470070837. The cubic root of 18899426 is about 266.3685038981.

The spelling of 18899426 in words is "eighteen million, eight hundred ninety-nine thousand, four hundred twenty-six".