18036432 has 60 divisors (see below), whose sum is σ = 52357760. Its totient is φ = 6010848.

The previous prime is 18036407. The next prime is 18036437. The reversal of 18036432 is 23463081.

It is a happy number.

18036432 is a `hidden beast` number, since 18 + 0 + 3 + 643 + 2 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18036396 and 18036405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18036437) 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 11 ways as a sum of consecutive naturals, for example, 1569 + ... + 6207.

Almost surely, 2^18036432 is an apocalyptic number.

18036432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18036432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26178880).

18036432 is an abundant number, since it is smaller than the sum of its proper divisors (34321328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18036432 is an equidigital number, since it uses as much as digits as its factorization.

18036432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662 (or 4644 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 18036432 is about 4246.9320691530. The cubic root of 18036432 is about 262.2508329513.

The spelling of 18036432 in words is "eighteen million, thirty-six thousand, four hundred thirty-two".