18036269 has 16 divisors (see below), whose sum is σ = 19822320. Its totient is φ = 16343040.

The previous prime is 18036247. The next prime is 18036287. The reversal of 18036269 is 96263081.

It can be written as a sum of positive squares in 8 ways, for example, as 714025 + 17322244 = 845^2 + 4162^2 .

It is a cyclic number.

It is not a de Polignac number, because 18036269 - 2⁸ = 18036013 is a prime.

It is a super-2 number, since 2×18036269² = 650613998880722, 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 (18036229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78647 + ... + 78875.

It is an arithmetic number, because the mean of its divisors is an integer number (1238895).

Almost surely, 2^18036269 is an apocalyptic number.

It is an amenable number.

18036269 is a deficient number, since it is larger than the sum of its proper divisors (1786051).

18036269 is a wasteful number, since it uses less digits than its factorization.

18036269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 18036269 is about 4246.9128787862. The cubic root of 18036269 is about 262.2500429389.

The spelling of 18036269 in words is "eighteen million, thirty-six thousand, two hundred sixty-nine".