20222968643 has 2 divisors, whose sum is σ = 20222968644. Its totient is φ = 20222968642.

The previous prime is 20222968621. The next prime is 20222968657. The reversal of 20222968643 is 34686922202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20222968643 is a prime.

It is a super-2 number, since 2×20222968643² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20222968594 and 20222968603.

It is not a weakly prime, because it can be changed into another prime (20222968943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111484321 + 10111484322.

It is an arithmetic number, because the mean of its divisors is an integer number (10111484322).

Almost surely, 2^20222968643 is an apocalyptic number.

20222968643 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222968643 is an equidigital number, since it uses as much as digits as its factorization.

20222968643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 20222968643 in words is "twenty billion, two hundred twenty-two million, nine hundred sixty-eight thousand, six hundred forty-three".