20818473983 has 12 divisors (see below), whose sum is σ = 22565700360. Its totient is φ = 19189704816.

The previous prime is 20818473967. The next prime is 20818474003. The reversal of 20818473983 is 38937481802.

It is not a de Polignac number, because 20818473983 - 2⁴ = 20818473967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20818470983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 765953 + ... + 792666.

It is an arithmetic number, because the mean of its divisors is an integer number (1880475030).

Almost surely, 2^20818473983 is an apocalyptic number.

20818473983 is a deficient number, since it is larger than the sum of its proper divisors (1747226377).

20818473983 is a wasteful number, since it uses less digits than its factorization.

20818473983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558694 (or 1558675 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 20818473983 in words is "twenty billion, eight hundred eighteen million, four hundred seventy-three thousand, nine hundred eighty-three".