20361109 has 2 divisors, whose sum is σ = 20361110. Its totient is φ = 20361108.

The previous prime is 20361101. The next prime is 20361119. The reversal of 20361109 is 90116302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20277009 + 84100 = 4503^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 20361109 - 2³ = 20361101 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20361109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20361101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10180554 + 10180555.

It is an arithmetic number, because the mean of its divisors is an integer number (10180555).

Almost surely, 2^20361109 is an apocalyptic number.

It is an amenable number.

20361109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20361109 is an equidigital number, since it uses as much as digits as its factorization.

20361109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 20361109 is about 4512.3285563000. The cubic root of 20361109 is about 273.0656946293.

The spelling of 20361109 in words is "twenty million, three hundred sixty-one thousand, one hundred nine".