24718805981 has 2 divisors, whose sum is σ = 24718805982. Its totient is φ = 24718805980.

The previous prime is 24718805959. The next prime is 24718805983. The reversal of 24718805981 is 18950881742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15238668025 + 9480137956 = 123445^2 + 97366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24718805981 is a prime.

It is a super-2 number, since 2×24718805981² (a number of 22 digits) contains 22 as substring.

Together with 24718805983, 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 (24718805983) 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, 12359402990 + 12359402991.

It is an arithmetic number, because the mean of its divisors is an integer number (12359402991).

Almost surely, 2^24718805981 is an apocalyptic number.

It is an amenable number.

24718805981 is a deficient number, since it is larger than the sum of its proper divisors (1).

24718805981 is an equidigital number, since it uses as much as digits as its factorization.

24718805981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 53.

The spelling of 24718805981 in words is "twenty-four billion, seven hundred eighteen million, eight hundred five thousand, nine hundred eighty-one".