21013436213 has 24 divisors (see below), whose sum is σ = 28069909920. Its totient is φ = 15512303520.

The previous prime is 21013436207. The next prime is 21013436219. The reversal of 21013436213 is 31263431012.

It is an interprime number because it is at equal distance from previous prime (21013436207) and next prime (21013436219).

It is not a de Polignac number, because 21013436213 - 2⁸ = 21013435957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013436219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1015706 + ... + 1036187.

It is an arithmetic number, because the mean of its divisors is an integer number (1169579580).

Almost surely, 2^21013436213 is an apocalyptic number.

It is an amenable number.

21013436213 is a deficient number, since it is larger than the sum of its proper divisors (7056473707).

21013436213 is a wasteful number, since it uses less digits than its factorization.

21013436213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051937 (or 2051930 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21013436213 its reverse (31263431012), we get a palindrome (52276867225).

The spelling of 21013436213 in words is "twenty-one billion, thirteen million, four hundred thirty-six thousand, two hundred thirteen".