21803519852198 has 24 divisors (see below), whose sum is σ = 38393953250400. Its totient is φ = 9258637521168.

The previous prime is 21803519852123. The next prime is 21803519852203. The reversal of 21803519852198 is 89125891530812.

It is a self number, because there is not a number n which added to its sum of digits gives 21803519852198.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1020562238 + ... + 1020583601.

It is an arithmetic number, because the mean of its divisors is an integer number (1599748052100).

Almost surely, 2^{21803519852198} is an apocalyptic number.

21803519852198 is a deficient number, since it is larger than the sum of its proper divisors (16590433398202).

21803519852198 is a wasteful number, since it uses less digits than its factorization.

21803519852198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041145964 (or 2041145957 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 62.

The spelling of 21803519852198 in words is "twenty-one trillion, eight hundred three billion, five hundred nineteen million, eight hundred fifty-two thousand, one hundred ninety-eight".