21776919882 has 16 divisors (see below), whose sum is σ = 45846147360. Its totient is φ = 6876922032.

The previous prime is 21776919881. The next prime is 21776919919. The reversal of 21776919882 is 28891967712.

It is not an unprimeable number, because it can be changed into a prime (21776919881) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 95512693 + ... + 95512920.

It is an arithmetic number, because the mean of its divisors is an integer number (2865384210).

Almost surely, 2^21776919882 is an apocalyptic number.

21776919882 is an abundant number, since it is smaller than the sum of its proper divisors (24069227478).

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

21776919882 is a wasteful number, since it uses less digits than its factorization.

21776919882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191025637.

The product of its digits is 6096384, while the sum is 60.

The spelling of 21776919882 in words is "twenty-one billion, seven hundred seventy-six million, nine hundred nineteen thousand, eight hundred eighty-two".