20320223444 has 12 divisors (see below), whose sum is σ = 35644860468. Its totient is φ = 10135977600.

The previous prime is 20320223423. The next prime is 20320223459. The reversal of 20320223444 is 44432202302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1224300100 + 19095923344 = 34990^2 + 138188^2 .

It is a super-2 number, since 2×20320223444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6031637 + ... + 6035004.

It is an arithmetic number, because the mean of its divisors is an integer number (2970405039).

Almost surely, 2^20320223444 is an apocalyptic number.

It is an amenable number.

20320223444 is a deficient number, since it is larger than the sum of its proper divisors (15324637024).

20320223444 is a wasteful number, since it uses less digits than its factorization.

20320223444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12067066 (or 12067064 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 20320223444 its reverse (44432202302), we get a palindrome (64752425746).

The spelling of 20320223444 in words is "twenty billion, three hundred twenty million, two hundred twenty-three thousand, four hundred forty-four".