21433440266 has 8 divisors (see below), whose sum is σ = 36743040480. Its totient is φ = 9185760108.

The previous prime is 21433440247. The next prime is 21433440293. The reversal of 21433440266 is 66204433412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765479996 + ... + 765480023.

It is an arithmetic number, because the mean of its divisors is an integer number (4592880060).

Almost surely, 2^21433440266 is an apocalyptic number.

21433440266 is a deficient number, since it is larger than the sum of its proper divisors (15309600214).

21433440266 is a wasteful number, since it uses less digits than its factorization.

21433440266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530960028.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 21433440266 its reverse (66204433412), we get a palindrome (87637873678).

The spelling of 21433440266 in words is "twenty-one billion, four hundred thirty-three million, four hundred forty thousand, two hundred sixty-six".