20607109 has 2 divisors, whose sum is σ = 20607110. Its totient is φ = 20607108.

The previous prime is 20607073. The next prime is 20607127. The reversal of 20607109 is 90170602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19802500 + 804609 = 4450^2 + 897^2 .

It is a cyclic number.

It is not a de Polignac number, because 20607109 - 2¹⁵ = 20574341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20607709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10303554 + 10303555.

It is an arithmetic number, because the mean of its divisors is an integer number (10303555).

Almost surely, 2^20607109 is an apocalyptic number.

It is an amenable number.

20607109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20607109 is an equidigital number, since it uses as much as digits as its factorization.

20607109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 20607109 is about 4539.5053695309. The cubic root of 20607109 is about 274.1610087842.

The spelling of 20607109 in words is "twenty million, six hundred seven thousand, one hundred nine".