21200827366 has 4 divisors (see below), whose sum is σ = 31801241052. Its totient is φ = 10600413682.

The previous prime is 21200827357. The next prime is 21200827397. The reversal of 21200827366 is 66372800212.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300206840 + ... + 5300206843.

It is an arithmetic number, because the mean of its divisors is an integer number (7950310263).

Almost surely, 2^21200827366 is an apocalyptic number.

21200827366 is a deficient number, since it is larger than the sum of its proper divisors (10600413686).

21200827366 is a wasteful number, since it uses less digits than its factorization.

21200827366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600413685.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 21200827366 in words is "twenty-one billion, two hundred million, eight hundred twenty-seven thousand, three hundred sixty-six".