18669386 has 8 divisors (see below), whose sum is σ = 28761060. Its totient is φ = 9082368.

The previous prime is 18669377. The next prime is 18669389. The reversal of 18669386 is 68396681.

It can be written as a sum of positive squares in 2 ways, for example, as 18653761 + 15625 = 4319^2 + 125^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 18669386.

It is not an unprimeable number, because it can be changed into a prime (18669389) 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, 126071 + ... + 126218.

Almost surely, 2^18669386 is an apocalyptic number.

18669386 is a deficient number, since it is larger than the sum of its proper divisors (10091674).

18669386 is a wasteful number, since it uses less digits than its factorization.

18669386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252328.

The product of its digits is 373248, while the sum is 47.

The square root of 18669386 is about 4320.8084891603. The cubic root of 18669386 is about 265.2833613092.

The spelling of 18669386 in words is "eighteen million, six hundred sixty-nine thousand, three hundred eighty-six".