21043203262 has 16 divisors (see below), whose sum is σ = 33642901152. Its totient is φ = 9837100800.

The previous prime is 21043203253. The next prime is 21043203289. The reversal of 21043203262 is 26230234012.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2044263 + ... + 2054530.

It is an arithmetic number, because the mean of its divisors is an integer number (2102681322).

Almost surely, 2^21043203262 is an apocalyptic number.

21043203262 is a deficient number, since it is larger than the sum of its proper divisors (12599697890).

21043203262 is a wasteful number, since it uses less digits than its factorization.

21043203262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4098963.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21043203262 its reverse (26230234012), we get a palindrome (47273437274).

The spelling of 21043203262 in words is "twenty-one billion, forty-three million, two hundred three thousand, two hundred sixty-two".