24997918993 has 6 divisors (see below), whose sum is σ = 26382845634. Its totient is φ = 23682238704.

The previous prime is 24997918963. The next prime is 24997919017. The reversal of 24997918993 is 39981979942.

It can be written as a sum of positive squares in only one way, i.e., 16070125824 + 8927793169 = 126768^2 + 94487^2 .

It is a de Polignac number, because none of the positive numbers 2^k-24997918993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24997918963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34622796 + ... + 34623517.

It is an arithmetic number, because the mean of its divisors is an integer number (4397140939).

Almost surely, 2^24997918993 is an apocalyptic number.

It is an amenable number.

24997918993 is a deficient number, since it is larger than the sum of its proper divisors (1384926641).

24997918993 is an equidigital number, since it uses as much as digits as its factorization.

24997918993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69246351 (or 69246332 counting only the distinct ones).

The product of its digits is 79361856, while the sum is 70.

The spelling of 24997918993 in words is "twenty-four billion, nine hundred ninety-seven million, nine hundred eighteen thousand, nine hundred ninety-three".