20581364983 has 2 divisors, whose sum is σ = 20581364984. Its totient is φ = 20581364982.

The previous prime is 20581364981. The next prime is 20581365017. The reversal of 20581364983 is 38946318502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20581364983 - 2¹ = 20581364981 is a prime.

Together with 20581364981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20581364981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10290682491 + 10290682492.

It is an arithmetic number, because the mean of its divisors is an integer number (10290682492).

Almost surely, 2^20581364983 is an apocalyptic number.

20581364983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20581364983 is an equidigital number, since it uses as much as digits as its factorization.

20581364983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 20581364983 in words is "twenty billion, five hundred eighty-one million, three hundred sixty-four thousand, nine hundred eighty-three".