18027236 has 12 divisors (see below), whose sum is σ = 31578540. Its totient is φ = 9004800.

The previous prime is 18027227. The next prime is 18027271. The reversal of 18027236 is 63272081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14440000 + 3587236 = 3800^2 + 1894^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18027199 and 18027208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5036 + ... + 7836.

It is an arithmetic number, because the mean of its divisors is an integer number (2631545).

Almost surely, 2^18027236 is an apocalyptic number.

It is an amenable number.

18027236 is a deficient number, since it is larger than the sum of its proper divisors (13551304).

18027236 is a wasteful number, since it uses less digits than its factorization.

18027236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4414 (or 4412 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 18027236 is about 4245.8492672256. The cubic root of 18027236 is about 262.2062552387.

The spelling of 18027236 in words is "eighteen million, twenty-seven thousand, two hundred thirty-six".