20144232 has 48 divisors (see below), whose sum is σ = 55011840. Its totient is φ = 6658848.

The previous prime is 20144231. The next prime is 20144239. The reversal of 20144232 is 23244102.

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

It is not an unprimeable number, because it can be changed into a prime (20144231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8043 + ... + 10245.

It is an arithmetic number, because the mean of its divisors is an integer number (1146080).

Almost surely, 2^20144232 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 20144232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27505920).

20144232 is an abundant number, since it is smaller than the sum of its proper divisors (34867608).

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

20144232 is a wasteful number, since it uses less digits than its factorization.

20144232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342 (or 2335 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20144232 is about 4488.2326142926. The cubic root of 20144232 is about 272.0927091700.

Adding to 20144232 its reverse (23244102), we get a palindrome (43388334).

The spelling of 20144232 in words is "twenty million, one hundred forty-four thousand, two hundred thirty-two".