21133443982 has 16 divisors (see below), whose sum is σ = 36236890080. Its totient is φ = 9055158048.

The previous prime is 21133443977. The next prime is 21133443997. The reversal of 21133443982 is 28934433112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103857 + ... + 230332.

It is an arithmetic number, because the mean of its divisors is an integer number (2264805630).

Almost surely, 2^21133443982 is an apocalyptic number.

21133443982 is a deficient number, since it is larger than the sum of its proper divisors (15103446098).

21133443982 is a wasteful number, since it uses less digits than its factorization.

21133443982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338715.

The product of its digits is 124416, while the sum is 40.

The spelling of 21133443982 in words is "twenty-one billion, one hundred thirty-three million, four hundred forty-three thousand, nine hundred eighty-two".