20021223316 has 6 divisors (see below), whose sum is σ = 35037140810. Its totient is φ = 10010611656.

The previous prime is 20021223311. The next prime is 20021223317. The reversal of 20021223316 is 61332212002.

It can be written as a sum of positive squares in only one way, i.e., 19896230916 + 124992400 = 141054^2 + 11180^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021223311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2502652911 + ... + 2502652918.

Almost surely, 2^20021223316 is an apocalyptic number.

It is an amenable number.

20021223316 is a deficient number, since it is larger than the sum of its proper divisors (15015917494).

20021223316 is a wasteful number, since it uses less digits than its factorization.

20021223316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005305833 (or 5005305831 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20021223316 its reverse (61332212002), we get a palindrome (81353435318).

The spelling of 20021223316 in words is "twenty billion, twenty-one million, two hundred twenty-three thousand, three hundred sixteen".