20021223307 has 2 divisors, whose sum is σ = 20021223308. Its totient is φ = 20021223306.

The previous prime is 20021223293. The next prime is 20021223311. The reversal of 20021223307 is 70332212002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20021223307 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021223317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010611653 + 10010611654.

It is an arithmetic number, because the mean of its divisors is an integer number (10010611654).

Almost surely, 2^20021223307 is an apocalyptic number.

20021223307 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021223307 is an equidigital number, since it uses as much as digits as its factorization.

20021223307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 22.

Adding to 20021223307 its reverse (70332212002), we get a palindrome (90353435309).

The spelling of 20021223307 in words is "twenty billion, twenty-one million, two hundred twenty-three thousand, three hundred seven".