21304103634 has 48 divisors (see below), whose sum is σ = 50368485024. Its totient is φ = 6454080000.

The previous prime is 21304103617. The next prime is 21304103663. The reversal of 21304103634 is 43630140312.

21304103634 is a `hidden beast` number, since 2 + 13 + 0 + 4 + 10 + 3 + 634 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21304103598 and 21304103607.

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 23 ways as a sum of consecutive naturals, for example, 875634 + ... + 899634.

It is an arithmetic number, because the mean of its divisors is an integer number (1049343438).

Almost surely, 2^21304103634 is an apocalyptic number.

21304103634 is an abundant number, since it is smaller than the sum of its proper divisors (29064381390).

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

21304103634 is a wasteful number, since it uses less digits than its factorization.

21304103634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28503 (or 28500 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21304103634 its reverse (43630140312), we get a palindrome (64934243946).

The spelling of 21304103634 in words is "twenty-one billion, three hundred four million, one hundred three thousand, six hundred thirty-four".