21126719588 has 48 divisors (see below), whose sum is σ = 41228502000. Its totient is φ = 9405462528.

The previous prime is 21126719569. The next prime is 21126719611. The reversal of 21126719588 is 88591762112.

It can be written as a sum of positive squares in 8 ways, for example, as 9564448804 + 11562270784 = 97798^2 + 107528^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1696328 + ... + 1708736.

It is an arithmetic number, because the mean of its divisors is an integer number (858927125).

Almost surely, 2^21126719588 is an apocalyptic number.

It is an amenable number.

21126719588 is a deficient number, since it is larger than the sum of its proper divisors (20101782412).

21126719588 is a wasteful number, since it uses less digits than its factorization.

21126719588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13584 (or 13582 counting only the distinct ones).

The product of its digits is 483840, while the sum is 50.

The spelling of 21126719588 in words is "twenty-one billion, one hundred twenty-six million, seven hundred nineteen thousand, five hundred eighty-eight".