20442240424 has 8 divisors (see below), whose sum is σ = 38329200810. Its totient is φ = 10221120208.

The previous prime is 20442240419. The next prime is 20442240433. The reversal of 20442240424 is 42404224402.

It can be written as a sum of positive squares in only one way, i.e., 16284312100 + 4157928324 = 127610^2 + 64482^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 20442240392 and 20442240401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277640019 + ... + 1277640034.

Almost surely, 2^20442240424 is an apocalyptic number.

It is an amenable number.

20442240424 is a deficient number, since it is larger than the sum of its proper divisors (17886960386).

20442240424 is a wasteful number, since it uses less digits than its factorization.

20442240424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555280059 (or 2555280055 counting only the distinct ones).

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

Adding to 20442240424 its reverse (42404224402), we get a palindrome (62846464826).

The spelling of 20442240424 in words is "twenty billion, four hundred forty-two million, two hundred forty thousand, four hundred twenty-four".