21204302411 has 4 divisors (see below), whose sum is σ = 21209383032. Its totient is φ = 21199221792.

The previous prime is 21204302401. The next prime is 21204302473. The reversal of 21204302411 is 11420340212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21204302411 - 2²² = 21200108107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21204302401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2534045 + ... + 2542398.

It is an arithmetic number, because the mean of its divisors is an integer number (5302345758).

Almost surely, 2^21204302411 is an apocalyptic number.

21204302411 is a deficient number, since it is larger than the sum of its proper divisors (5080621).

21204302411 is an equidigital number, since it uses as much as digits as its factorization.

21204302411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5080620.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21204302411 its reverse (11420340212), we get a palindrome (32624642623).

The spelling of 21204302411 in words is "twenty-one billion, two hundred four million, three hundred two thousand, four hundred eleven".