200021668349 has 4 divisors (see below), whose sum is σ = 200022649440. Its totient is φ = 200020687260.

The previous prime is 200021668339. The next prime is 200021668367. The reversal of 200021668349 is 943866120002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 200021668349 - 2⁴ = 200021668333 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 (200021668339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57017 + ... + 635054.

It is an arithmetic number, because the mean of its divisors is an integer number (50005662360).

Almost surely, 2^200021668349 is an apocalyptic number.

It is an amenable number.

200021668349 is a deficient number, since it is larger than the sum of its proper divisors (981091).

200021668349 is an equidigital number, since it uses as much as digits as its factorization.

200021668349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981090.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 200021668349 in words is "two hundred billion, twenty-one million, six hundred sixty-eight thousand, three hundred forty-nine".