21753367199 has 2 divisors, whose sum is σ = 21753367200. Its totient is φ = 21753367198.

The previous prime is 21753367183. The next prime is 21753367231. The reversal of 21753367199 is 99176335712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21753367199 - 2⁴ = 21753367183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21753367199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21753363199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10876683599 + 10876683600.

It is an arithmetic number, because the mean of its divisors is an integer number (10876683600).

Almost surely, 2^21753367199 is an apocalyptic number.

21753367199 is a deficient number, since it is larger than the sum of its proper divisors (1).

21753367199 is an equidigital number, since it uses as much as digits as its factorization.

21753367199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2143260, while the sum is 53.

The spelling of 21753367199 in words is "twenty-one billion, seven hundred fifty-three million, three hundred sixty-seven thousand, one hundred ninety-nine".