21434233204 has 12 divisors (see below), whose sum is σ = 37630520928. Its totient is φ = 10682655800.

The previous prime is 21434233201. The next prime is 21434233211. The reversal of 21434233204 is 40233243412.

It is a super-2 number, since 2×21434233204² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434233201) 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 in 3 ways as a sum of consecutive naturals, for example, 8613802 + ... + 8616289.

It is an arithmetic number, because the mean of its divisors is an integer number (3135876744).

Almost surely, 2^21434233204 is an apocalyptic number.

It is an amenable number.

21434233204 is a deficient number, since it is larger than the sum of its proper divisors (16196287724).

21434233204 is a wasteful number, since it uses less digits than its factorization.

21434233204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17230406 (or 17230404 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21434233204 its reverse (40233243412), we get a palindrome (61667476616).

The spelling of 21434233204 in words is "twenty-one billion, four hundred thirty-four million, two hundred thirty-three thousand, two hundred four".