20432244 has 48 divisors (see below), whose sum is σ = 55193600. Its totient is φ = 5762016.

The previous prime is 20432233. The next prime is 20432261. The reversal of 20432244 is 44223402.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20432244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5097 + ... + 8175.

Almost surely, 2^20432244 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 20432244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27596800).

20432244 is an abundant number, since it is smaller than the sum of its proper divisors (34761356).

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

20432244 is a wasteful number, since it uses less digits than its factorization.

20432244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172 (or 3170 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 20432244 is about 4520.2039776984. The cubic root of 20432244 is about 273.3833255113.

Adding to 20432244 its reverse (44223402), we get a palindrome (64655646).

The spelling of 20432244 in words is "twenty million, four hundred thirty-two thousand, two hundred forty-four".