20831898807101 has 2 divisors, whose sum is σ = 20831898807102. Its totient is φ = 20831898807100.

The previous prime is 20831898807029. The next prime is 20831898807107. The reversal of 20831898807101 is 10170889813802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18756469603876 + 2075429203225 = 4330874^2 + 1440635^2 .

It is a cyclic number.

It is not a de Polignac number, because 20831898807101 - 2¹⁸ = 20831898544957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20831898807107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10415949403550 + 10415949403551.

It is an arithmetic number, because the mean of its divisors is an integer number (10415949403551).

Almost surely, 2^{20831898807101} is an apocalyptic number.

It is an amenable number.

20831898807101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20831898807101 is an equidigital number, since it uses as much as digits as its factorization.

20831898807101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 56.

The spelling of 20831898807101 in words is "twenty trillion, eight hundred thirty-one billion, eight hundred ninety-eight million, eight hundred seven thousand, one hundred one".