21432204104 has 32 divisors (see below), whose sum is σ = 40604976000. Its totient is φ = 10604744640.

The previous prime is 21432204091. The next prime is 21432204139. The reversal of 21432204104 is 40140223412.

It is a self number, because there is not a number n which added to its sum of digits gives 21432204104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289859 + ... + 356205.

It is an arithmetic number, because the mean of its divisors is an integer number (1268905500).

Almost surely, 2^21432204104 is an apocalyptic number.

It is an amenable number.

21432204104 is a deficient number, since it is larger than the sum of its proper divisors (19172771896).

21432204104 is a wasteful number, since it uses less digits than its factorization.

21432204104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66773 (or 66769 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21432204104 its reverse (40140223412), we get a palindrome (61572427516).

The spelling of 21432204104 in words is "twenty-one billion, four hundred thirty-two million, two hundred four thousand, one hundred four".