20364109 has 2 divisors, whose sum is σ = 20364110. Its totient is φ = 20364108.

The previous prime is 20364103. The next prime is 20364139. The reversal of 20364109 is 90146302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15288100 + 5076009 = 3910^2 + 2253^2 .

It is a cyclic number.

It is not a de Polignac number, because 20364109 - 2³ = 20364101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20364101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10182054 + 10182055.

It is an arithmetic number, because the mean of its divisors is an integer number (10182055).

Almost surely, 2^20364109 is an apocalyptic number.

It is an amenable number.

20364109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20364109 is an equidigital number, since it uses as much as digits as its factorization.

20364109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20364109 is about 4512.6609666581. The cubic root of 20364109 is about 273.0791051113.

The spelling of 20364109 in words is "twenty million, three hundred sixty-four thousand, one hundred nine".