22021263647 has 2 divisors, whose sum is σ = 22021263648. Its totient is φ = 22021263646.

The previous prime is 22021263643. The next prime is 22021263683. The reversal of 22021263647 is 74636212022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22021263647 - 2² = 22021263643 is a prime.

It is a super-2 number, since 2×22021263647² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22021263643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010631823 + 11010631824.

It is an arithmetic number, because the mean of its divisors is an integer number (11010631824).

Almost surely, 2^22021263647 is an apocalyptic number.

22021263647 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021263647 is an equidigital number, since it uses as much as digits as its factorization.

22021263647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 35.

Adding to 22021263647 its reverse (74636212022), we get a palindrome (96657475669).

The spelling of 22021263647 in words is "twenty-two billion, twenty-one million, two hundred sixty-three thousand, six hundred forty-seven".