20001001011983 has 2 divisors, whose sum is σ = 20001001011984. Its totient is φ = 20001001011982.

The previous prime is 20001001011967. The next prime is 20001001012033. The reversal of 20001001011983 is 38911010010002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001001011983 - 2⁴ = 20001001011967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001001011923) by changing a digit.

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 as a sum of consecutive naturals, namely, 10000500505991 + 10000500505992.

It is an arithmetic number, because the mean of its divisors is an integer number (10000500505992).

Almost surely, 2^{20001001011983} is an apocalyptic number.

20001001011983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001001011983 is an equidigital number, since it uses as much as digits as its factorization.

20001001011983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

Adding to 20001001011983 its reverse (38911010010002), we get a palindrome (58912011021985).

The spelling of 20001001011983 in words is "twenty trillion, one billion, one million, eleven thousand, nine hundred eighty-three".