20432444 has 12 divisors (see below), whose sum is σ = 36015000. Its totient is φ = 10142448.

The previous prime is 20432437. The next prime is 20432449. The reversal of 20432444 is 44423402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17819 + ... + 18930.

It is an arithmetic number, because the mean of its divisors is an integer number (3001250).

Almost surely, 2^20432444 is an apocalyptic number.

It is an amenable number.

20432444 is a deficient number, since it is larger than the sum of its proper divisors (15582556).

20432444 is a wasteful number, since it uses less digits than its factorization.

20432444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36892 (or 36890 counting only the distinct ones).

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

The square root of 20432444 is about 4520.2261005397. The cubic root of 20432444 is about 273.3842175080.

Adding to 20432444 its reverse (44423402), we get a palindrome (64855846).

The spelling of 20432444 in words is "twenty million, four hundred thirty-two thousand, four hundred forty-four".