22835657981 has 2 divisors, whose sum is σ = 22835657982. Its totient is φ = 22835657980.

The previous prime is 22835657917. The next prime is 22835657987. The reversal of 22835657981 is 18975653822.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15254473081 + 7581184900 = 123509^2 + 87070^2 .

It is a cyclic number.

It is not a de Polignac number, because 22835657981 - 2⁶ = 22835657917 is a prime.

It is a super-2 number, since 2×22835657981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22835657987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11417828990 + 11417828991.

It is an arithmetic number, because the mean of its divisors is an integer number (11417828991).

Almost surely, 2^22835657981 is an apocalyptic number.

It is an amenable number.

22835657981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22835657981 is an equidigital number, since it uses as much as digits as its factorization.

22835657981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 56.

The spelling of 22835657981 in words is "twenty-two billion, eight hundred thirty-five million, six hundred fifty-seven thousand, nine hundred eighty-one".