18887966 has 8 divisors (see below), whose sum is σ = 28476360. Its totient is φ = 9395848.

The previous prime is 18887941. The next prime is 18887983. The reversal of 18887966 is 66978881.

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

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, 23576 + ... + 24363.

It is an arithmetic number, because the mean of its divisors is an integer number (3559545).

Almost surely, 2^18887966 is an apocalyptic number.

18887966 is a deficient number, since it is larger than the sum of its proper divisors (9588394).

18887966 is a wasteful number, since it uses less digits than its factorization.

18887966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48138.

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

The square root of 18887966 is about 4346.0287619849. The cubic root of 18887966 is about 266.3146539336.

The spelling of 18887966 in words is "eighteen million, eight hundred eighty-seven thousand, nine hundred sixty-six".