20111232 has 64 divisors (see below), whose sum is σ = 54149760. Its totient is φ = 6612480.

The previous prime is 20111213. The next prime is 20111243. The reversal of 20111232 is 23211102.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31557 + ... + 32187.

It is an arithmetic number, because the mean of its divisors is an integer number (846090).

Almost surely, 2^20111232 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 20111232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27074880).

20111232 is an abundant number, since it is smaller than the sum of its proper divisors (34038528).

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

20111232 is an equidigital number, since it uses as much as digits as its factorization.

20111232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20111232 is about 4484.5548274048. The cubic root of 20111232 is about 271.9440484683.

Adding to 20111232 its reverse (23211102), we get a palindrome (43322334).

The spelling of 20111232 in words is "twenty million, one hundred eleven thousand, two hundred thirty-two".