20504232 has 128 divisors (see below), whose sum is σ = 66355200. Its totient is φ = 5745600.

The previous prime is 20504221. The next prime is 20504353. The reversal of 20504232 is 23240502.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107257 + ... + 107447.

It is an arithmetic number, because the mean of its divisors is an integer number (518400).

Almost surely, 2^20504232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20504232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33177600).

20504232 is an abundant number, since it is smaller than the sum of its proper divisors (45850968).

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

20504232 is a wasteful number, since it uses less digits than its factorization.

20504232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20504232 is about 4528.1598911699. The cubic root of 20504232 is about 273.7040155449.

Adding to 20504232 its reverse (23240502), we get a palindrome (43744734).

It can be divided in two parts, 20504 and 232, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20504232 in words is "twenty million, five hundred four thousand, two hundred thirty-two".