20983808850 has 48 divisors (see below), whose sum is σ = 52351524288. Its totient is φ = 5562168640.

The previous prime is 20983808809. The next prime is 20983808863. The reversal of 20983808850 is 5880838902.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20983808793 and 20983808802.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 393789 + ... + 443888.

It is an arithmetic number, because the mean of its divisors is an integer number (1090656756).

Almost surely, 2^20983808850 is an apocalyptic number.

20983808850 is an abundant number, since it is smaller than the sum of its proper divisors (31367715438).

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

20983808850 is a wasteful number, since it uses less digits than its factorization.

20983808850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837859 (or 837854 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 20983808850 in words is "twenty billion, nine hundred eighty-three million, eight hundred eight thousand, eight hundred fifty".