22503857891 has 2 divisors, whose sum is σ = 22503857892. Its totient is φ = 22503857890.

The previous prime is 22503857881. The next prime is 22503857917. The reversal of 22503857891 is 19875830522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22503857891 - 2¹⁰ = 22503856867 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (22503857851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11251928945 + 11251928946.

It is an arithmetic number, because the mean of its divisors is an integer number (11251928946).

Almost surely, 2^22503857891 is an apocalyptic number.

22503857891 is a deficient number, since it is larger than the sum of its proper divisors (1).

22503857891 is an equidigital number, since it uses as much as digits as its factorization.

22503857891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 22503857891 in words is "twenty-two billion, five hundred three million, eight hundred fifty-seven thousand, eight hundred ninety-one".