21304030013 has 16 divisors (see below), whose sum is σ = 24419581056. Its totient is φ = 18206596800.

The previous prime is 21304030001. The next prime is 21304030021. The reversal of 21304030013 is 31003040312.

It is a happy number.

It is not a de Polignac number, because 21304030013 - 2⁴ = 21304029997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21304029973 and 21304030000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304030313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3593870 + ... + 3599792.

It is an arithmetic number, because the mean of its divisors is an integer number (1526223816).

Almost surely, 2^21304030013 is an apocalyptic number.

It is an amenable number.

21304030013 is a deficient number, since it is larger than the sum of its proper divisors (3115551043).

21304030013 is an equidigital number, since it uses as much as digits as its factorization.

21304030013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7364.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21304030013 its reverse (31003040312), we get a palindrome (52307070325).

The spelling of 21304030013 in words is "twenty-one billion, three hundred four million, thirty thousand, thirteen".