21434004104 has 16 divisors (see below), whose sum is σ = 40219763100. Its totient is φ = 10708733952.

The previous prime is 21434004089. The next prime is 21434004113. The reversal of 21434004104 is 40140043412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14969522500 + 6464481604 = 122350^2 + 80402^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21434004104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1022489 + ... + 1043240.

Almost surely, 2^21434004104 is an apocalyptic number.

It is an amenable number.

21434004104 is a deficient number, since it is larger than the sum of its proper divisors (18785758996).

21434004104 is a wasteful number, since it uses less digits than its factorization.

21434004104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2067032 (or 2067028 counting only the distinct ones).

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

Adding to 21434004104 its reverse (40140043412), we get a palindrome (61574047516).

The spelling of 21434004104 in words is "twenty-one billion, four hundred thirty-four million, four thousand, one hundred four".