21003220982 has 8 divisors (see below), whose sum is σ = 31547465400. Its totient is φ = 10487399184.

The previous prime is 21003220969. The next prime is 21003220993. The reversal of 21003220982 is 28902230012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21003220982² (a number of 21 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 3 ways as a sum of consecutive naturals, for example, 7103807 + ... + 7106762.

It is an arithmetic number, because the mean of its divisors is an integer number (3943433175).

Almost surely, 2^21003220982 is an apocalyptic number.

21003220982 is a deficient number, since it is larger than the sum of its proper divisors (10544244418).

21003220982 is a wasteful number, since it uses less digits than its factorization.

21003220982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14211310.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 21003220982 its reverse (28902230012), we get a palindrome (49905450994).

The spelling of 21003220982 in words is "twenty-one billion, three million, two hundred twenty thousand, nine hundred eighty-two".