23913443285 has 4 divisors (see below), whose sum is σ = 28696131948. Its totient is φ = 19130754624.

The previous prime is 23913443273. The next prime is 23913443287. The reversal of 23913443285 is 58234431932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2804549764 + 21108893521 = 52958^2 + 145289^2 .

It is a cyclic number.

It is not a de Polignac number, because 23913443285 - 2¹² = 23913439189 is a prime.

It is a super-5 number, since 5×23913443285⁵ (a number of 53 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23913443287) 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 in 3 ways as a sum of consecutive naturals, for example, 2391344324 + ... + 2391344333.

It is an arithmetic number, because the mean of its divisors is an integer number (7174032987).

Almost surely, 2^23913443285 is an apocalyptic number.

It is an amenable number.

23913443285 is a deficient number, since it is larger than the sum of its proper divisors (4782688663).

23913443285 is an equidigital number, since it uses as much as digits as its factorization.

23913443285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4782688662.

The product of its digits is 622080, while the sum is 44.

The spelling of 23913443285 in words is "twenty-three billion, nine hundred thirteen million, four hundred forty-three thousand, two hundred eighty-five".