23944786220491 has 2 divisors, whose sum is σ = 23944786220492. Its totient is φ = 23944786220490.

The previous prime is 23944786220473. The next prime is 23944786220513. The reversal of 23944786220491 is 19402268744932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23944786220491 - 2⁷ = 23944786220363 is a prime.

It is not a weakly prime, because it can be changed into another prime (23944786220401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11972393110245 + 11972393110246.

It is an arithmetic number, because the mean of its divisors is an integer number (11972393110246).

Almost surely, 2^{23944786220491} is an apocalyptic number.

23944786220491 is a deficient number, since it is larger than the sum of its proper divisors (1).

23944786220491 is an equidigital number, since it uses as much as digits as its factorization.

23944786220491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41803776, while the sum is 61.

The spelling of 23944786220491 in words is "twenty-three trillion, nine hundred forty-four billion, seven hundred eighty-six million, two hundred twenty thousand, four hundred ninety-one".