22342499981 has 2 divisors, whose sum is σ = 22342499982. Its totient is φ = 22342499980.

The previous prime is 22342499941. The next prime is 22342500013. The reversal of 22342499981 is 18999424322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16290437956 + 6052062025 = 127634^2 + 77795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22342499981 is a prime.

It is a super-2 number, since 2×22342499981² (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 (22342499911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11171249990 + 11171249991.

It is an arithmetic number, because the mean of its divisors is an integer number (11171249991).

Almost surely, 2^22342499981 is an apocalyptic number.

It is an amenable number.

22342499981 is a deficient number, since it is larger than the sum of its proper divisors (1).

22342499981 is an equidigital number, since it uses as much as digits as its factorization.

22342499981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 53.

The spelling of 22342499981 in words is "twenty-two billion, three hundred forty-two million, four hundred ninety-nine thousand, nine hundred eighty-one".