18026069 has 4 divisors (see below), whose sum is σ = 19086444. Its totient is φ = 16965696.

The previous prime is 18026059. The next prime is 18026087. The reversal of 18026069 is 96062081.

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 9394225 + 8631844 = 3065^2 + 2938^2 .

It is a cyclic number.

It is not a de Polignac number, because 18026069 - 2⁴ = 18026053 is a prime.

It is a super-2 number, since 2×18026069² = 649878327185522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18026009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530162 + ... + 530195.

It is an arithmetic number, because the mean of its divisors is an integer number (4771611).

Almost surely, 2^18026069 is an apocalyptic number.

It is an amenable number.

18026069 is a deficient number, since it is larger than the sum of its proper divisors (1060375).

18026069 is a wasteful number, since it uses less digits than its factorization.

18026069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060374.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18026069 is about 4245.7118366653. The cubic root of 18026069 is about 262.2005971093.

The spelling of 18026069 in words is "eighteen million, twenty-six thousand, sixty-nine".