200021668345 has 16 divisors (see below), whose sum is σ = 243808168320. Its totient is φ = 157499806464.

The previous prime is 200021668339. The next prime is 200021668367. The reversal of 200021668345 is 543866120002.

It is a cyclic number.

It is not a de Polignac number, because 200021668345 - 2³ = 200021668337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165601 + ... + 653809.

It is an arithmetic number, because the mean of its divisors is an integer number (15238010520).

Almost surely, 2^200021668345 is an apocalyptic number.

It is an amenable number.

200021668345 is a deficient number, since it is larger than the sum of its proper divisors (43786499975).

200021668345 is a wasteful number, since it uses less digits than its factorization.

200021668345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489504.

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 200021668345 its reverse (543866120002), we get a palindrome (743887788347).

The spelling of 200021668345 in words is "two hundred billion, twenty-one million, six hundred sixty-eight thousand, three hundred forty-five".