20018912101 has 2 divisors, whose sum is σ = 20018912102. Its totient is φ = 20018912100.

The previous prime is 20018912099. The next prime is 20018912117. The reversal of 20018912101 is 10121981002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14364022500 + 5654889601 = 119850^2 + 75199^2 .

It is a cyclic number.

It is not a de Polignac number, because 20018912101 - 2¹ = 20018912099 is a prime.

Together with 20018912099, 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 (20018912131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10009456050 + 10009456051.

It is an arithmetic number, because the mean of its divisors is an integer number (10009456051).

Almost surely, 2^20018912101 is an apocalyptic number.

It is an amenable number.

20018912101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20018912101 is an equidigital number, since it uses as much as digits as its factorization.

20018912101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 20018912101 in words is "twenty billion, eighteen million, nine hundred twelve thousand, one hundred one".