20321018983 has 2 divisors, whose sum is σ = 20321018984. Its totient is φ = 20321018982.

The previous prime is 20321018953. The next prime is 20321018989. The reversal of 20321018983 is 38981012302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20321018983 - 2⁵ = 20321018951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20321018989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160509491 + 10160509492.

It is an arithmetic number, because the mean of its divisors is an integer number (10160509492).

Almost surely, 2^20321018983 is an apocalyptic number.

20321018983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20321018983 is an equidigital number, since it uses as much as digits as its factorization.

20321018983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 20321018983 in words is "twenty billion, three hundred twenty-one million, eighteen thousand, nine hundred eighty-three".