21304104231 has 8 divisors (see below), whose sum is σ = 28423422720. Its totient is φ = 14193760952.

The previous prime is 21304104229. The next prime is 21304104257. The reversal of 21304104231 is 13240140312.

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

It is a cyclic number.

It is not a de Polignac number, because 21304104231 - 2¹ = 21304104229 is a prime.

It is a super-2 number, since 2×21304104231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21304104198 and 21304104207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304174231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2238261 + ... + 2247758.

It is an arithmetic number, because the mean of its divisors is an integer number (3552927840).

Almost surely, 2^21304104231 is an apocalyptic number.

21304104231 is a deficient number, since it is larger than the sum of its proper divisors (7119318489).

21304104231 is a wasteful number, since it uses less digits than its factorization.

21304104231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4487605.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21304104231 its reverse (13240140312), we get a palindrome (34544244543).

The spelling of 21304104231 in words is "twenty-one billion, three hundred four million, one hundred four thousand, two hundred thirty-one".