23391871333 has 2 divisors, whose sum is σ = 23391871334. Its totient is φ = 23391871332.

The previous prime is 23391871331. The next prime is 23391871379. The reversal of 23391871333 is 33317819332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21592245249 + 1799626084 = 146943^2 + 42422^2 .

It is a cyclic number.

It is not a de Polignac number, because 23391871333 - 2¹ = 23391871331 is a prime.

Together with 23391871331, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 23391871333.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23391871331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11695935666 + 11695935667.

It is an arithmetic number, because the mean of its divisors is an integer number (11695935667).

Almost surely, 2^23391871333 is an apocalyptic number.

It is an amenable number.

23391871333 is a deficient number, since it is larger than the sum of its proper divisors (1).

23391871333 is an equidigital number, since it uses as much as digits as its factorization.

23391871333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 43.

The spelling of 23391871333 in words is "twenty-three billion, three hundred ninety-one million, eight hundred seventy-one thousand, three hundred thirty-three".