21234134020013 has 8 divisors (see below), whose sum is σ = 21482915545728. Its totient is φ = 20986172203824.

The previous prime is 21234134020009. The next prime is 21234134020027. The reversal of 21234134020013 is 31002043143212.

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 21234134020013 - 2² = 21234134020009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234134020213) 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, 204875270 + ... + 204978887.

It is an arithmetic number, because the mean of its divisors is an integer number (2685364443216).

Almost surely, 2^{21234134020013} is an apocalyptic number.

It is an amenable number.

21234134020013 is a deficient number, since it is larger than the sum of its proper divisors (248781525715).

21234134020013 is a wasteful number, since it uses less digits than its factorization.

21234134020013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409854763.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21234134020013 its reverse (31002043143212), we get a palindrome (52236177163225).

The spelling of 21234134020013 in words is "twenty-one trillion, two hundred thirty-four billion, one hundred thirty-four million, twenty thousand, thirteen".