21404334411 has 12 divisors (see below), whose sum is σ = 31441395960. Its totient is φ = 14027699040.

The previous prime is 21404334353. The next prime is 21404334421. The reversal of 21404334411 is 11443340412.

21404334411 is a `hidden beast` number, since 214 + 0 + 4 + 3 + 3 + 441 + 1 = 666.

It is not a de Polignac number, because 21404334411 - 2⁷ = 21404334283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21404334421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20154210 + ... + 20155271.

It is an arithmetic number, because the mean of its divisors is an integer number (2620116330).

Almost surely, 2^21404334411 is an apocalyptic number.

21404334411 is a deficient number, since it is larger than the sum of its proper divisors (10037061549).

21404334411 is a wasteful number, since it uses less digits than its factorization.

21404334411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40309546 (or 40309543 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21404334411 its reverse (11443340412), we get a palindrome (32847674823).

The spelling of 21404334411 in words is "twenty-one billion, four hundred four million, three hundred thirty-four thousand, four hundred eleven".