23844264721 has 2 divisors, whose sum is σ = 23844264722. Its totient is φ = 23844264720.

The previous prime is 23844264713. The next prime is 23844264739. The reversal of 23844264721 is 12746244832.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14529891600 + 9314373121 = 120540^2 + 96511^2 .

It is a cyclic number.

It is not a de Polignac number, because 23844264721 - 2³ = 23844264713 is a prime.

It is a super-3 number, since 3×23844264721³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (23844264791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11922132360 + 11922132361.

It is an arithmetic number, because the mean of its divisors is an integer number (11922132361).

Almost surely, 2^23844264721 is an apocalyptic number.

It is an amenable number.

23844264721 is a deficient number, since it is larger than the sum of its proper divisors (1).

23844264721 is an equidigital number, since it uses as much as digits as its factorization.

23844264721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 43.

The spelling of 23844264721 in words is "twenty-three billion, eight hundred forty-four million, two hundred sixty-four thousand, seven hundred twenty-one".