20444432 has 20 divisors (see below), whose sum is σ = 40360140. Its totient is φ = 10028928.

The previous prime is 20444429. The next prime is 20444471. The reversal of 20444432 is 23444402.

It can be written as a sum of positive squares in 2 ways, for example, as 13808656 + 6635776 = 3716^2 + 2576^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20444398 and 20444407.

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 3 ways as a sum of consecutive naturals, for example, 11207 + ... + 12902.

It is an arithmetic number, because the mean of its divisors is an integer number (2018007).

Almost surely, 2^20444432 is an apocalyptic number.

It is an amenable number.

20444432 is a deficient number, since it is larger than the sum of its proper divisors (19915708).

20444432 is a wasteful number, since it uses less digits than its factorization.

20444432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24170 (or 24164 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 20444432 is about 4521.5519459584. The cubic root of 20444432 is about 273.4376731667.

Adding to 20444432 its reverse (23444402), we get a palindrome (43888834).

The spelling of 20444432 in words is "twenty million, four hundred forty-four thousand, four hundred thirty-two".