23123403203491 has 2 divisors, whose sum is σ = 23123403203492. Its totient is φ = 23123403203490.

The previous prime is 23123403203413. The next prime is 23123403203521. The reversal of 23123403203491 is 19430230432132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23123403203491 is a prime.

It is a super-2 number, since 2×23123403203491² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23123403203491.

It is not a weakly prime, because it can be changed into another prime (23123403203401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11561701601745 + 11561701601746.

It is an arithmetic number, because the mean of its divisors is an integer number (11561701601746).

Almost surely, 2^{23123403203491} is an apocalyptic number.

23123403203491 is a deficient number, since it is larger than the sum of its proper divisors (1).

23123403203491 is an equidigital number, since it uses as much as digits as its factorization.

23123403203491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 37.

The spelling of 23123403203491 in words is "twenty-three trillion, one hundred twenty-three billion, four hundred three million, two hundred three thousand, four hundred ninety-one".