23842443809 has 2 divisors, whose sum is σ = 23842443810. Its totient is φ = 23842443808.

The previous prime is 23842443799. The next prime is 23842443827. The reversal of 23842443809 is 90834424832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21307824784 + 2534619025 = 145972^2 + 50345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23842443809 is a prime.

It is not a weakly prime, because it can be changed into another prime (23842443109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11921221904 + 11921221905.

It is an arithmetic number, because the mean of its divisors is an integer number (11921221905).

Almost surely, 2^23842443809 is an apocalyptic number.

It is an amenable number.

23842443809 is a deficient number, since it is larger than the sum of its proper divisors (1).

23842443809 is an equidigital number, since it uses as much as digits as its factorization.

23842443809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1327104, while the sum is 47.

The spelling of 23842443809 in words is "twenty-three billion, eight hundred forty-two million, four hundred forty-three thousand, eight hundred nine".