20001322144 has 12 divisors (see below), whose sum is σ = 39377603034. Its totient is φ = 10000661056.

The previous prime is 20001322139. The next prime is 20001322151. The reversal of 20001322144 is 44122310002.

It can be written as a sum of positive squares in only one way, i.e., 16233817744 + 3767504400 = 127412^2 + 61380^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312520627 + ... + 312520690.

Almost surely, 2^20001322144 is an apocalyptic number.

It is an amenable number.

20001322144 is a deficient number, since it is larger than the sum of its proper divisors (19376280890).

20001322144 is an equidigital number, since it uses as much as digits as its factorization.

20001322144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625041327 (or 625041319 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20001322144 its reverse (44122310002), we get a palindrome (64123632146).

The spelling of 20001322144 in words is "twenty billion, one million, three hundred twenty-two thousand, one hundred forty-four".