20109820271 has 2 divisors, whose sum is σ = 20109820272. Its totient is φ = 20109820270.

The previous prime is 20109820201. The next prime is 20109820303. The reversal of 20109820271 is 17202890102.

It is a happy number.

It is an a-pointer prime, because the next prime (20109820303) can be obtained adding 20109820271 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20109820271 - 2³⁰ = 19036078447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20109820201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10054910135 + 10054910136.

It is an arithmetic number, because the mean of its divisors is an integer number (10054910136).

Almost surely, 2^20109820271 is an apocalyptic number.

20109820271 is a deficient number, since it is larger than the sum of its proper divisors (1).

20109820271 is an equidigital number, since it uses as much as digits as its factorization.

20109820271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The spelling of 20109820271 in words is "twenty billion, one hundred nine million, eight hundred twenty thousand, two hundred seventy-one".