21433423133413 has 4 divisors (see below), whose sum is σ = 21433446171648. Its totient is φ = 21433400095180.

The previous prime is 21433423133363. The next prime is 21433423133443. The reversal of 21433423133413 is 31433132433412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21433423133413 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 (21433423133443) 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, 10062181 + ... + 12004762.

It is an arithmetic number, because the mean of its divisors is an integer number (5358361542912).

Almost surely, 2^{21433423133413} is an apocalyptic number.

It is an amenable number.

21433423133413 is a deficient number, since it is larger than the sum of its proper divisors (23038235).

21433423133413 is an equidigital number, since it uses as much as digits as its factorization.

21433423133413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23038234.

The product of its digits is 186624, while the sum is 37.

Adding to 21433423133413 its reverse (31433132433412), we get a palindrome (52866555566825).

The spelling of 21433423133413 in words is "twenty-one trillion, four hundred thirty-three billion, four hundred twenty-three million, one hundred thirty-three thousand, four hundred thirteen".