20203000109 has 2 divisors, whose sum is σ = 20203000110. Its totient is φ = 20203000108.

The previous prime is 20203000063. The next prime is 20203000177. The reversal of 20203000109 is 90100030202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19938287209 + 264712900 = 141203^2 + 16270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20203000109 is a prime.

It is a super-2 number, since 2×20203000109² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203090109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101500054 + 10101500055.

It is an arithmetic number, because the mean of its divisors is an integer number (10101500055).

Almost surely, 2^20203000109 is an apocalyptic number.

It is an amenable number.

20203000109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203000109 is an equidigital number, since it uses as much as digits as its factorization.

20203000109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The spelling of 20203000109 in words is "twenty billion, two hundred three million, one hundred nine", and thus it is an aban number.