18349069 has 4 divisors (see below), whose sum is σ = 19428444. Its totient is φ = 17269696.

The previous prime is 18349063. The next prime is 18349081. The reversal of 18349069 is 96094381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16281225 + 2067844 = 4035^2 + 1438^2 .

It is a cyclic number.

It is not a de Polignac number, because 18349069 - 2¹⁵ = 18316301 is a prime.

It is a super-2 number, since 2×18349069² = 673376666333522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18349063) 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, 539662 + ... + 539695.

It is an arithmetic number, because the mean of its divisors is an integer number (4857111).

Almost surely, 2^18349069 is an apocalyptic number.

It is an amenable number.

18349069 is a deficient number, since it is larger than the sum of its proper divisors (1079375).

18349069 is a wasteful number, since it uses less digits than its factorization.

18349069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079374.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 18349069 is about 4283.5813287482. The cubic root of 18349069 is about 263.7574150937.

The spelling of 18349069 in words is "eighteen million, three hundred forty-nine thousand, sixty-nine".