18899666 has 8 divisors (see below), whose sum is σ = 28389504. Its totient is φ = 9436500.

The previous prime is 18899663. The next prime is 18899693. The reversal of 18899666 is 66699881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18899663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4790 + ... + 7793.

It is an arithmetic number, because the mean of its divisors is an integer number (3548688).

Almost surely, 2^18899666 is an apocalyptic number.

18899666 is a deficient number, since it is larger than the sum of its proper divisors (9489838).

18899666 is a wasteful number, since it uses less digits than its factorization.

18899666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13336.

The product of its digits is 1119744, while the sum is 53.

The square root of 18899666 is about 4347.3746100376. The cubic root of 18899666 is about 266.3696314133.

The spelling of 18899666 in words is "eighteen million, eight hundred ninety-nine thousand, six hundred sixty-six".