21879348182 has 4 divisors (see below), whose sum is σ = 32819022276. Its totient is φ = 10939674090.

The previous prime is 21879348181. The next prime is 21879348241. The reversal of 21879348182 is 28184397812.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21879348181) 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 as a sum of consecutive naturals, namely, 5469837044 + ... + 5469837047.

It is an arithmetic number, because the mean of its divisors is an integer number (8204755569).

Almost surely, 2^21879348182 is an apocalyptic number.

21879348182 is a deficient number, since it is larger than the sum of its proper divisors (10939674094).

21879348182 is a wasteful number, since it uses less digits than its factorization.

21879348182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10939674093.

The product of its digits is 1548288, while the sum is 53.

The spelling of 21879348182 in words is "twenty-one billion, eight hundred seventy-nine million, three hundred forty-eight thousand, one hundred eighty-two".