23203514891 has 2 divisors, whose sum is σ = 23203514892. Its totient is φ = 23203514890.

The previous prime is 23203514819. The next prime is 23203514909. The reversal of 23203514891 is 19841530232.

Together with previous prime (23203514819) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23203514891 - 2³⁴ = 6023645707 is a prime.

It is not a weakly prime, because it can be changed into another prime (23203514491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11601757445 + 11601757446.

It is an arithmetic number, because the mean of its divisors is an integer number (11601757446).

Almost surely, 2^23203514891 is an apocalyptic number.

23203514891 is a deficient number, since it is larger than the sum of its proper divisors (1).

23203514891 is an equidigital number, since it uses as much as digits as its factorization.

23203514891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

Adding to 23203514891 its sum of digits (38), we get a square (23203514929 = 152327²).

The spelling of 23203514891 in words is "twenty-three billion, two hundred three million, five hundred fourteen thousand, eight hundred ninety-one".