20402244424 has 32 divisors (see below), whose sum is σ = 39116918520. Its totient is φ = 9972458496.

The previous prime is 20402244349. The next prime is 20402244433. The reversal of 20402244424 is 42444220402.

It can be written as a sum of positive squares in 4 ways, for example, as 19465272324 + 936972100 = 139518^2 + 30610^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20402244392 and 20402244401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30592 + ... + 204304.

Almost surely, 2^20402244424 is an apocalyptic number.

It is an amenable number.

20402244424 is a deficient number, since it is larger than the sum of its proper divisors (18714674096).

20402244424 is a wasteful number, since it uses less digits than its factorization.

20402244424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174049 (or 174045 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 20402244424 its reverse (42444220402), we get a palindrome (62846464826).

The spelling of 20402244424 in words is "twenty billion, four hundred two million, two hundred forty-four thousand, four hundred twenty-four".