21423303199 has 2 divisors, whose sum is σ = 21423303200. Its totient is φ = 21423303198.

The previous prime is 21423303173. The next prime is 21423303217. The reversal of 21423303199 is 99130332412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21423303199 - 2⁷ = 21423303071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21423303169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10711651599 + 10711651600.

It is an arithmetic number, because the mean of its divisors is an integer number (10711651600).

Almost surely, 2^21423303199 is an apocalyptic number.

21423303199 is a deficient number, since it is larger than the sum of its proper divisors (1).

21423303199 is an equidigital number, since it uses as much as digits as its factorization.

21423303199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 37.

The spelling of 21423303199 in words is "twenty-one billion, four hundred twenty-three million, three hundred three thousand, one hundred ninety-nine".