21204034232 has 8 divisors (see below), whose sum is σ = 39757564200. Its totient is φ = 10602017112.

The previous prime is 21204034231. The next prime is 21204034283. The reversal of 21204034232 is 23243040212.

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

It is a super-2 number, since 2×21204034232² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21204034198 and 21204034207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21204034231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325252132 + ... + 1325252147.

It is an arithmetic number, because the mean of its divisors is an integer number (4969695525).

Almost surely, 2^21204034232 is an apocalyptic number.

It is an amenable number.

21204034232 is a deficient number, since it is larger than the sum of its proper divisors (18553529968).

21204034232 is a wasteful number, since it uses less digits than its factorization.

21204034232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650504285 (or 2650504281 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21204034232 its reverse (23243040212), we get a palindrome (44447074444).

The spelling of 21204034232 in words is "twenty-one billion, two hundred four million, thirty-four thousand, two hundred thirty-two".