21133443064 has 32 divisors (see below), whose sum is σ = 41024718000. Its totient is φ = 10194107392.

The previous prime is 21133443061. The next prime is 21133443131. The reversal of 21133443064 is 46034433112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133443061) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 255912 + ... + 328264.

Almost surely, 2^21133443064 is an apocalyptic number.

It is an amenable number.

21133443064 is a deficient number, since it is larger than the sum of its proper divisors (19891274936).

21133443064 is a wasteful number, since it uses less digits than its factorization.

21133443064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73647 (or 73643 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 21133443064 its reverse (46034433112), we get a palindrome (67167876176).

The spelling of 21133443064 in words is "twenty-one billion, one hundred thirty-three million, four hundred forty-three thousand, sixty-four".