20079109 has 2 divisors, whose sum is σ = 20079110. Its totient is φ = 20079108.

The previous prime is 20079089. The next prime is 20079113. The reversal of 20079109 is 90197002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19936225 + 142884 = 4465^2 + 378^2 .

It is a cyclic number.

It is not a de Polignac number, because 20079109 - 2¹³ = 20070917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20079119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10039554 + 10039555.

It is an arithmetic number, because the mean of its divisors is an integer number (10039555).

Almost surely, 2^20079109 is an apocalyptic number.

It is an amenable number.

20079109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20079109 is an equidigital number, since it uses as much as digits as its factorization.

20079109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 20079109 is about 4480.9718811883. The cubic root of 20079109 is about 271.7991822585.

The spelling of 20079109 in words is "twenty million, seventy-nine thousand, one hundred nine".