21530050199 has 8 divisors (see below), whose sum is σ = 24917237760. Its totient is φ = 18220729176.

The previous prime is 21530050189. The next prime is 21530050237. The reversal of 21530050199 is 99105003512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21530050199 - 2²⁸ = 21261614743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21530050189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19466039 + ... + 19467144.

It is an arithmetic number, because the mean of its divisors is an integer number (3114654720).

Almost surely, 2^21530050199 is an apocalyptic number.

21530050199 is a deficient number, since it is larger than the sum of its proper divisors (3387187561).

21530050199 is an equidigital number, since it uses as much as digits as its factorization.

21530050199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38933269.

The product of its (nonzero) digits is 12150, while the sum is 35.

The spelling of 21530050199 in words is "twenty-one billion, five hundred thirty million, fifty thousand, one hundred ninety-nine".