21200897359 has 4 divisors (see below), whose sum is σ = 21201234480. Its totient is φ = 21200560240.

The previous prime is 21200897339. The next prime is 21200897407. The reversal of 21200897359 is 95379800212.

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

It is a cyclic number.

It is not a de Polignac number, because 21200897359 - 2¹³ = 21200889167 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 (21200897309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43102 + ... + 210379.

It is an arithmetic number, because the mean of its divisors is an integer number (5300308620).

Almost surely, 2^21200897359 is an apocalyptic number.

21200897359 is a deficient number, since it is larger than the sum of its proper divisors (337121).

21200897359 is an equidigital number, since it uses as much as digits as its factorization.

21200897359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337120.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 21200897359 in words is "twenty-one billion, two hundred million, eight hundred ninety-seven thousand, three hundred fifty-nine".