22111989553 has 2 divisors, whose sum is σ = 22111989554. Its totient is φ = 22111989552.

The previous prime is 22111989551. The next prime is 22111989563. The reversal of 22111989553 is 35598911122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22103363584 + 8625969 = 148672^2 + 2937^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111989553 - 2¹ = 22111989551 is a prime.

It is a super-2 number, since 2×22111989553² (a number of 21 digits) contains 22 as substring.

Together with 22111989551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22111989551) 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, 11055994776 + 11055994777.

It is an arithmetic number, because the mean of its divisors is an integer number (11055994777).

Almost surely, 2^22111989553 is an apocalyptic number.

It is an amenable number.

22111989553 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111989553 is an equidigital number, since it uses as much as digits as its factorization.

22111989553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 46.

The spelling of 22111989553 in words is "twenty-two billion, one hundred eleven million, nine hundred eighty-nine thousand, five hundred fifty-three".