21332013224 has 8 divisors (see below), whose sum is σ = 39997524810. Its totient is φ = 10666006608.

The previous prime is 21332013223. The next prime is 21332013239. The reversal of 21332013224 is 42231023312.

It can be written as a sum of positive squares in only one way, i.e., 17633184100 + 3698829124 = 132790^2 + 60818^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21332013224.

It is not an unprimeable number, because it can be changed into a prime (21332013223) 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 as a sum of consecutive naturals, namely, 1333250819 + ... + 1333250834.

Almost surely, 2^21332013224 is an apocalyptic number.

It is an amenable number.

21332013224 is a deficient number, since it is larger than the sum of its proper divisors (18665511586).

21332013224 is a wasteful number, since it uses less digits than its factorization.

21332013224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666501659 (or 2666501655 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21332013224 its reverse (42231023312), we get a palindrome (63563036536).

The spelling of 21332013224 in words is "twenty-one billion, three hundred thirty-two million, thirteen thousand, two hundred twenty-four".