21304203135 has 8 divisors (see below), whose sum is σ = 34086725040. Its totient is φ = 11362241664.

The previous prime is 21304203133. The next prime is 21304203187. The reversal of 21304203135 is 53130240312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21304203135 - 2¹ = 21304203133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304203133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710140090 + ... + 710140119.

It is an arithmetic number, because the mean of its divisors is an integer number (4260840630).

Almost surely, 2^21304203135 is an apocalyptic number.

21304203135 is a deficient number, since it is larger than the sum of its proper divisors (12782521905).

21304203135 is a wasteful number, since it uses less digits than its factorization.

21304203135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420280217.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 21304203135 its reverse (53130240312), we get a palindrome (74434443447).

The spelling of 21304203135 in words is "twenty-one billion, three hundred four million, two hundred three thousand, one hundred thirty-five".