20109232277 has 2 divisors, whose sum is σ = 20109232278. Its totient is φ = 20109232276.

The previous prime is 20109232271. The next prime is 20109232333. The reversal of 20109232277 is 77223290102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18087291121 + 2021941156 = 134489^2 + 44966^2 .

It is a cyclic number.

It is not a de Polignac number, because 20109232277 - 2¹⁰ = 20109231253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20109232271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10054616138 + 10054616139.

It is an arithmetic number, because the mean of its divisors is an integer number (10054616139).

Almost surely, 2^20109232277 is an apocalyptic number.

It is an amenable number.

20109232277 is a deficient number, since it is larger than the sum of its proper divisors (1).

20109232277 is an equidigital number, since it uses as much as digits as its factorization.

20109232277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 20109232277 in words is "twenty billion, one hundred nine million, two hundred thirty-two thousand, two hundred seventy-seven".