20320321444 has 12 divisors (see below), whose sum is σ = 35562417100. Its totient is φ = 10159630848.

The previous prime is 20320321429. The next prime is 20320321447. The reversal of 20320321444 is 44412302302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4894681444 + 15425640000 = 69962^2 + 124200^2 .

It is not an unprimeable number, because it can be changed into a prime (20320321447) 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, 38829 + ... + 205300.

Almost surely, 2^20320321444 is an apocalyptic number.

It is an amenable number.

20320321444 is a deficient number, since it is larger than the sum of its proper divisors (15242095656).

20320321444 is a wasteful number, since it uses less digits than its factorization.

20320321444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264942 (or 264940 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20320321444 its reverse (44412302302), we get a palindrome (64732623746).

It can be divided in two parts, 2032032 and 1444, that added together give a square (2033476 = 1426²).

The spelling of 20320321444 in words is "twenty billion, three hundred twenty million, three hundred twenty-one thousand, four hundred forty-four".