21471334411382 has 16 divisors (see below), whose sum is σ = 33902413969200. Its totient is φ = 10170539988480.

The previous prime is 21471334411361. The next prime is 21471334411451. The reversal of 21471334411382 is 28311443317412.

It is a super-2 number, since 2×21471334411382² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1789094 + ... + 6792902.

It is an arithmetic number, because the mean of its divisors is an integer number (2118900873075).

Almost surely, 2^{21471334411382} is an apocalyptic number.

21471334411382 is a deficient number, since it is larger than the sum of its proper divisors (12431079557818).

21471334411382 is a wasteful number, since it uses less digits than its factorization.

21471334411382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5116751.

The product of its digits is 387072, while the sum is 44.

Adding to 21471334411382 its reverse (28311443317412), we get a palindrome (49782777728794).

The spelling of 21471334411382 in words is "twenty-one trillion, four hundred seventy-one billion, three hundred thirty-four million, four hundred eleven thousand, three hundred eighty-two".