21204130013 has 16 divisors (see below), whose sum is σ = 23935478400. Its totient is φ = 18607068480.

The previous prime is 21204129959. The next prime is 21204130069. The reversal of 21204130013 is 31003140212.

It is not a de Polignac number, because 21204130013 - 2⁶ = 21204129949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21204129973 and 21204130000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21204130513) 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 15 ways as a sum of consecutive naturals, for example, 2023295 + ... + 2033747.

It is an arithmetic number, because the mean of its divisors is an integer number (1495967400).

Almost surely, 2^21204130013 is an apocalyptic number.

It is an amenable number.

21204130013 is a deficient number, since it is larger than the sum of its proper divisors (2731348387).

21204130013 is a wasteful number, since it uses less digits than its factorization.

21204130013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16852.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21204130013 its reverse (31003140212), we get a palindrome (52207270225).

The spelling of 21204130013 in words is "twenty-one billion, two hundred four million, one hundred thirty thousand, thirteen".