20092909 has 2 divisors, whose sum is σ = 20092910. Its totient is φ = 20092908.

The previous prime is 20092901. The next prime is 20092913. The reversal of 20092909 is 90929002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19448100 + 644809 = 4410^2 + 803^2 .

It is a cyclic number.

It is not a de Polignac number, because 20092909 - 2³ = 20092901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20092901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10046454 + 10046455.

It is an arithmetic number, because the mean of its divisors is an integer number (10046455).

Almost surely, 2^20092909 is an apocalyptic number.

It is an amenable number.

20092909 is a deficient number, since it is larger than the sum of its proper divisors (1).

20092909 is an equidigital number, since it uses as much as digits as its factorization.

20092909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 20092909 is about 4482.5114612235. The cubic root of 20092909 is about 271.8614355147.

The spelling of 20092909 in words is "twenty million, ninety-two thousand, nine hundred nine".