21600200667 has 4 divisors (see below), whose sum is σ = 28800267560. Its totient is φ = 14400133776.

The previous prime is 21600200651. The next prime is 21600200689. The reversal of 21600200667 is 76600200612.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21600200667 - 2⁴ = 21600200651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21600200617) 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, 3600033442 + ... + 3600033447.

It is an arithmetic number, because the mean of its divisors is an integer number (7200066890).

Almost surely, 2^21600200667 is an apocalyptic number.

21600200667 is a deficient number, since it is larger than the sum of its proper divisors (7200066893).

21600200667 is an equidigital number, since it uses as much as digits as its factorization.

21600200667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200066892.

The product of its (nonzero) digits is 6048, while the sum is 30.

Subtracting 21600200667 from its reverse (76600200612), we obtain a palindrome (54999999945).

The spelling of 21600200667 in words is "twenty-one billion, six hundred million, two hundred thousand, six hundred sixty-seven".