22303309981 has 2 divisors, whose sum is σ = 22303309982. Its totient is φ = 22303309980.

The previous prime is 22303309979. The next prime is 22303310039. The reversal of 22303309981 is 18990330322.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20097598756 + 2205711225 = 141766^2 + 46965^2 .

It is a cyclic number.

It is not a de Polignac number, because 22303309981 - 2¹ = 22303309979 is a prime.

It is a super-2 number, since 2×22303309981² (a number of 21 digits) contains 22 as substring.

Together with 22303309979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22303309081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11151654990 + 11151654991.

It is an arithmetic number, because the mean of its divisors is an integer number (11151654991).

Almost surely, 2^22303309981 is an apocalyptic number.

It is an amenable number.

22303309981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22303309981 is an equidigital number, since it uses as much as digits as its factorization.

22303309981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 22303309981 in words is "twenty-two billion, three hundred three million, three hundred nine thousand, nine hundred eighty-one".