18229032 has 96 divisors (see below), whose sum is σ = 53450280. Its totient is φ = 5591040.

The previous prime is 18229031. The next prime is 18229039. The reversal of 18229032 is 23092281.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18198756 + 30276 = 4266^2 + 174^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18228987 and 18229005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18229031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64732 + ... + 65012.

Almost surely, 2^18229032 is an apocalyptic number.

18229032 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 18229032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26725140).

18229032 is an abundant number, since it is smaller than the sum of its proper divisors (35221248).

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

18229032 is a wasteful number, since it uses less digits than its factorization.

18229032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18229032 is about 4269.5470485755. The cubic root of 18229032 is about 263.1810018222.

The spelling of 18229032 in words is "eighteen million, two hundred twenty-nine thousand, thirty-two".