20321216882 has 16 divisors (see below), whose sum is σ = 31027651512. Its totient is φ = 9979822080.

The previous prime is 20321216879. The next prime is 20321216953. The reversal of 20321216882 is 28861212302.

It can be written as a sum of positive squares in 4 ways, for example, as 19909492201 + 411724681 = 141101^2 + 20291^2 .

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, 253583 + ... + 323954.

Almost surely, 2^20321216882 is an apocalyptic number.

20321216882 is a deficient number, since it is larger than the sum of its proper divisors (10706434630).

20321216882 is a wasteful number, since it uses less digits than its factorization.

20321216882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577853.

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 20321216882 in words is "twenty billion, three hundred twenty-one million, two hundred sixteen thousand, eight hundred eighty-two".