20315232 has 96 divisors (see below), whose sum is σ = 67737600. Its totient is φ = 5802624.

The previous prime is 20315227. The next prime is 20315263. The reversal of 20315232 is 23251302.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 4369 + ... + 7727.

It is an arithmetic number, because the mean of its divisors is an integer number (705600).

Almost surely, 2^20315232 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 20315232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33868800).

20315232 is an abundant number, since it is smaller than the sum of its proper divisors (47422368).

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

20315232 is a wasteful number, since it uses less digits than its factorization.

20315232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3385 (or 3371 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20315232 is about 4507.2421723267. The cubic root of 20315232 is about 272.8604527722.

Adding to 20315232 its reverse (23251302), we get a palindrome (43566534).

The spelling of 20315232 in words is "twenty million, three hundred fifteen thousand, two hundred thirty-two".