21806119182979 has 8 divisors (see below), whose sum is σ = 22082301624320. Its totient is φ = 21529940632200.

The previous prime is 21806119182977. The next prime is 21806119182997. The reversal of 21806119182979 is 97928191160812.

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

It is a cyclic number.

It is not a de Polignac number, because 21806119182979 - 2¹ = 21806119182977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21806119182979.

It is not an unprimeable number, because it can be changed into a prime (21806119182977) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11279224 + ... + 13070314.

It is an arithmetic number, because the mean of its divisors is an integer number (2760287703040).

Almost surely, 2^{21806119182979} is an apocalyptic number.

21806119182979 is a deficient number, since it is larger than the sum of its proper divisors (276182441341).

21806119182979 is a wasteful number, since it uses less digits than its factorization.

21806119182979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945281.

The product of its (nonzero) digits is 7838208, while the sum is 64.

The spelling of 21806119182979 in words is "twenty-one trillion, eight hundred six billion, one hundred nineteen million, one hundred eighty-two thousand, nine hundred seventy-nine".