23023209991 has 2 divisors, whose sum is σ = 23023209992. Its totient is φ = 23023209990.

The previous prime is 23023209977. The next prime is 23023210019. The reversal of 23023209991 is 19990232032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23023209991 - 2⁵ = 23023209959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23023209961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11511604995 + 11511604996.

It is an arithmetic number, because the mean of its divisors is an integer number (11511604996).

Almost surely, 2^23023209991 is an apocalyptic number.

23023209991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23023209991 is an equidigital number, since it uses as much as digits as its factorization.

23023209991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 40.

The spelling of 23023209991 in words is "twenty-three billion, twenty-three million, two hundred nine thousand, nine hundred ninety-one".