23180463991 has 2 divisors, whose sum is σ = 23180463992. Its totient is φ = 23180463990.

The previous prime is 23180463989. The next prime is 23180464031. The reversal of 23180463991 is 19936408132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23180463991 - 2¹ = 23180463989 is a prime.

Together with 23180463989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23180463791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11590231995 + 11590231996.

It is an arithmetic number, because the mean of its divisors is an integer number (11590231996).

Almost surely, 2^23180463991 is an apocalyptic number.

23180463991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23180463991 is an equidigital number, since it uses as much as digits as its factorization.

23180463991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 23180463991 in words is "twenty-three billion, one hundred eighty million, four hundred sixty-three thousand, nine hundred ninety-one".