20091762017 has 2 divisors, whose sum is σ = 20091762018. Its totient is φ = 20091762016.

The previous prime is 20091762013. The next prime is 20091762023. The reversal of 20091762017 is 71026719002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19231865041 + 859896976 = 138679^2 + 29324^2 .

It is a cyclic number.

It is not a de Polignac number, because 20091762017 - 2² = 20091762013 is a prime.

It is not a weakly prime, because it can be changed into another prime (20091762013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10045881008 + 10045881009.

It is an arithmetic number, because the mean of its divisors is an integer number (10045881009).

Almost surely, 2^20091762017 is an apocalyptic number.

It is an amenable number.

20091762017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20091762017 is an equidigital number, since it uses as much as digits as its factorization.

20091762017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

The spelling of 20091762017 in words is "twenty billion, ninety-one million, seven hundred sixty-two thousand, seventeen".