23413021991 has 2 divisors, whose sum is σ = 23413021992. Its totient is φ = 23413021990.

The previous prime is 23413021939. The next prime is 23413022069. The reversal of 23413021991 is 19912031432.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23413021991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23413021091) 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 as a sum of consecutive naturals, namely, 11706510995 + 11706510996.

It is an arithmetic number, because the mean of its divisors is an integer number (11706510996).

Almost surely, 2^23413021991 is an apocalyptic number.

23413021991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23413021991 is an equidigital number, since it uses as much as digits as its factorization.

23413021991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 23413021991 in words is "twenty-three billion, four hundred thirteen million, twenty-one thousand, nine hundred ninety-one".