20044242464 has 12 divisors (see below), whose sum is σ = 39462102414. Its totient is φ = 10022121216.

The previous prime is 20044242431. The next prime is 20044242467. The reversal of 20044242464 is 46424244002.

It can be written as a sum of positive squares in only one way, i.e., 18741610000 + 1302632464 = 136900^2 + 36092^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 626382577 = 20044242464 / (2 + 0 + 0 + 4 + 4 + 2 + 4 + 2 + 4 + 6 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 20044242464.

It is not an unprimeable number, because it can be changed into a prime (20044242467) by changing a digit.

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, 313191257 + ... + 313191320.

Almost surely, 2^20044242464 is an apocalyptic number.

It is an amenable number.

20044242464 is a deficient number, since it is larger than the sum of its proper divisors (19417859950).

20044242464 is an equidigital number, since it uses as much as digits as its factorization.

20044242464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626382587 (or 626382579 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 20044242464 its reverse (46424244002), we get a palindrome (66468486466).

The spelling of 20044242464 in words is "twenty billion, forty-four million, two hundred forty-two thousand, four hundred sixty-four".