18886669 has 4 divisors (see below), whose sum is σ = 18904896. Its totient is φ = 18868444.

The previous prime is 18886661. The next prime is 18886717. The reversal of 18886669 is 96668881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18886669 - 2³ = 18886661 is a prime.

It is a super-2 number, since 2×18886669² = 713412531831122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18886661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7459 + ... + 9664.

It is an arithmetic number, because the mean of its divisors is an integer number (4726224).

Almost surely, 2^18886669 is an apocalyptic number.

It is an amenable number.

18886669 is a deficient number, since it is larger than the sum of its proper divisors (18227).

18886669 is a wasteful number, since it uses less digits than its factorization.

18886669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18226.

The product of its digits is 995328, while the sum is 52.

The square root of 18886669 is about 4345.8795427393. The cubic root of 18886669 is about 266.3085580238.

The spelling of 18886669 in words is "eighteen million, eight hundred eighty-six thousand, six hundred sixty-nine".