21434413311 has 6 divisors (see below), whose sum is σ = 30960819240. Its totient is φ = 14289608868.

The previous prime is 21434413289. The next prime is 21434413321. The reversal of 21434413311 is 11331443412.

21434413311 is a `hidden beast` number, since 2 + 1 + 4 + 344 + 1 + 3 + 311 = 666.

It is not a de Polignac number, because 21434413311 - 2²³ = 21426024703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434413321) 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 5 ways as a sum of consecutive naturals, for example, 1190800731 + ... + 1190800748.

It is an arithmetic number, because the mean of its divisors is an integer number (5160136540).

Almost surely, 2^21434413311 is an apocalyptic number.

21434413311 is a deficient number, since it is larger than the sum of its proper divisors (9526405929).

21434413311 is a wasteful number, since it uses less digits than its factorization.

21434413311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381601485 (or 2381601482 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 21434413311 its reverse (11331443412), we get a palindrome (32765856723).

The spelling of 21434413311 in words is "twenty-one billion, four hundred thirty-four million, four hundred thirteen thousand, three hundred eleven".