21320030982 has 32 divisors (see below), whose sum is σ = 44039521152. Its totient is φ = 6876523584.

The previous prime is 21320030981. The next prime is 21320030989. The reversal of 21320030982 is 28903002312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320030981) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 358543 + ... + 413754.

It is an arithmetic number, because the mean of its divisors is an integer number (1376235036).

Almost surely, 2^21320030982 is an apocalyptic number.

21320030982 is an abundant number, since it is smaller than the sum of its proper divisors (22719490170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21320030982 is a wasteful number, since it uses less digits than its factorization.

21320030982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772452.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 21320030982 in words is "twenty-one billion, three hundred twenty million, thirty thousand, nine hundred eighty-two".