20071109 has 2 divisors, whose sum is σ = 20071110. Its totient is φ = 20071108.

The previous prime is 20071097. The next prime is 20071141. The reversal of 20071109 is 90117002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16630084 + 3441025 = 4078^2 + 1855^2 .

It is a cyclic number.

It is not a de Polignac number, because 20071109 - 2²⁴ = 3293893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20071159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10035554 + 10035555.

It is an arithmetic number, because the mean of its divisors is an integer number (10035555).

Almost surely, 2^20071109 is an apocalyptic number.

It is an amenable number.

20071109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20071109 is an equidigital number, since it uses as much as digits as its factorization.

20071109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 20071109 is about 4480.0791287655. The cubic root of 20071109 is about 271.7630803528.

The spelling of 20071109 in words is "twenty million, seventy-one thousand, one hundred nine".