21134131882 has 16 divisors (see below), whose sum is σ = 31897499400. Its totient is φ = 10501742592.

The previous prime is 21134131819. The next prime is 21134131897. The reversal of 21134131882 is 28813143112.

It can be written as a sum of positive squares in 4 ways, for example, as 14971724881 + 6162407001 = 122359^2 + 78501^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363994 + ... + 418042.

Almost surely, 2^21134131882 is an apocalyptic number.

21134131882 is a deficient number, since it is larger than the sum of its proper divisors (10763367518).

21134131882 is a wasteful number, since it uses less digits than its factorization.

21134131882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55257.

The product of its digits is 9216, while the sum is 34.

Adding to 21134131882 its reverse (28813143112), we get a palindrome (49947274994).

The spelling of 21134131882 in words is "twenty-one billion, one hundred thirty-four million, one hundred thirty-one thousand, eight hundred eighty-two".