21202118182 has 8 divisors (see below), whose sum is σ = 36346488336. Its totient is φ = 9086622072.

The previous prime is 21202118141. The next prime is 21202118227. The reversal of 21202118182 is 28181120212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21202118182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 757218493 + ... + 757218520.

It is an arithmetic number, because the mean of its divisors is an integer number (4543311042).

Almost surely, 2^21202118182 is an apocalyptic number.

21202118182 is a deficient number, since it is larger than the sum of its proper divisors (15144370154).

21202118182 is a wasteful number, since it uses less digits than its factorization.

21202118182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514437022.

The product of its (nonzero) digits is 1024, while the sum is 28.

Adding to 21202118182 its reverse (28181120212), we get a palindrome (49383238394).

The spelling of 21202118182 in words is "twenty-one billion, two hundred two million, one hundred eighteen thousand, one hundred eighty-two".