18469685 has 8 divisors (see below), whose sum is σ = 23868600. Its totient is φ = 13639104.

The previous prime is 18469613. The next prime is 18469687. The reversal of 18469685 is 58696481.

It can be written as a sum of positive squares in 4 ways, for example, as 2961841 + 15507844 = 1721^2 + 3938^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18469685 - 2¹² = 18465589 is a prime.

It is a super-2 number, since 2×18469685² = 682258527998450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18469687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142010 + ... + 142139.

It is an arithmetic number, because the mean of its divisors is an integer number (2983575).

Almost surely, 2^18469685 is an apocalyptic number.

It is an amenable number.

18469685 is a deficient number, since it is larger than the sum of its proper divisors (5398915).

18469685 is a wasteful number, since it uses less digits than its factorization.

18469685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284167.

The product of its digits is 414720, while the sum is 47.

The square root of 18469685 is about 4297.6371415000. The cubic root of 18469685 is about 264.3340821420.

The spelling of 18469685 in words is "eighteen million, four hundred sixty-nine thousand, six hundred eighty-five".