24443099981 has 2 divisors, whose sum is σ = 24443099982. Its totient is φ = 24443099980.

The previous prime is 24443099969. The next prime is 24443099983. The reversal of 24443099981 is 18999034442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19581524356 + 4861575625 = 139934^2 + 69725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24443099981 is a prime.

It is a super-2 number, since 2×24443099981² (a number of 22 digits) contains 22 as substring.

Together with 24443099983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24443099983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12221549990 + 12221549991.

It is an arithmetic number, because the mean of its divisors is an integer number (12221549991).

Almost surely, 2^24443099981 is an apocalyptic number.

It is an amenable number.

24443099981 is a deficient number, since it is larger than the sum of its proper divisors (1).

24443099981 is an equidigital number, since it uses as much as digits as its factorization.

24443099981 is an evil number, because the sum of its binary digits is even.

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

The spelling of 24443099981 in words is "twenty-four billion, four hundred forty-three million, ninety-nine thousand, nine hundred eighty-one".