21082777182 has 12 divisors (see below), whose sum is σ = 45679350600. Its totient is φ = 7027592388.

The previous prime is 21082777181. The next prime is 21082777187. The reversal of 21082777182 is 28177728012.

It is a super-2 number, since 2×21082777182² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21082777181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 585632682 + ... + 585632717.

It is an arithmetic number, because the mean of its divisors is an integer number (3806612550).

Almost surely, 2^21082777182 is an apocalyptic number.

21082777182 is an abundant number, since it is smaller than the sum of its proper divisors (24596573418).

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

21082777182 is a wasteful number, since it uses less digits than its factorization.

21082777182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171265407 (or 1171265404 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 45.

The spelling of 21082777182 in words is "twenty-one billion, eighty-two million, seven hundred seventy-seven thousand, one hundred eighty-two".