21433440204 has 36 divisors (see below), whose sum is σ = 59104336200. Its totient is φ = 6494981760.

The previous prime is 21433440191. The next prime is 21433440227. The reversal of 21433440204 is 40204433412.

It is a happy number.

21433440204 is a `hidden beast` number, since 2 + 14 + 3 + 3 + 440 + 204 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 27062029 + ... + 27062820.

Almost surely, 2^21433440204 is an apocalyptic number.

It is an amenable number.

21433440204 is an abundant number, since it is smaller than the sum of its proper divisors (37670895996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21433440204 is a wasteful number, since it uses less digits than its factorization.

21433440204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54124870 (or 54124865 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21433440204 its reverse (40204433412), we get a palindrome (61637873616).

The spelling of 21433440204 in words is "twenty-one billion, four hundred thirty-three million, four hundred forty thousand, two hundred four".