22156220369 has 2 divisors, whose sum is σ = 22156220370. Its totient is φ = 22156220368.

The previous prime is 22156220341. The next prime is 22156220477. The reversal of 22156220369 is 96302265122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21553763344 + 602457025 = 146812^2 + 24545^2 .

It is a cyclic number.

It is not a de Polignac number, because 22156220369 - 2²⁰ = 22155171793 is a prime.

It is a super-2 number, since 2×22156220369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22156220969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11078110184 + 11078110185.

It is an arithmetic number, because the mean of its divisors is an integer number (11078110185).

Almost surely, 2^22156220369 is an apocalyptic number.

It is an amenable number.

22156220369 is a deficient number, since it is larger than the sum of its proper divisors (1).

22156220369 is an equidigital number, since it uses as much as digits as its factorization.

22156220369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 22156220369 in words is "twenty-two billion, one hundred fifty-six million, two hundred twenty thousand, three hundred sixty-nine".