20001011010989 has 2 divisors, whose sum is σ = 20001011010990. Its totient is φ = 20001011010988.

The previous prime is 20001011010961. The next prime is 20001011011043. The reversal of 20001011010989 is 98901011010002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11407729166089 + 8593281844900 = 3377533^2 + 2931430^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001011010989 - 2¹⁶ = 20001010945453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001011010689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000505505494 + 10000505505495.

It is an arithmetic number, because the mean of its divisors is an integer number (10000505505495).

Almost surely, 2^{20001011010989} is an apocalyptic number.

It is an amenable number.

20001011010989 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001011010989 is an equidigital number, since it uses as much as digits as its factorization.

20001011010989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 20001011010989 in words is "twenty trillion, one billion, eleven million, ten thousand, nine hundred eighty-nine".