20001100309 has 2 divisors, whose sum is σ = 20001100310. Its totient is φ = 20001100308.

The previous prime is 20001100283. The next prime is 20001100349. The reversal of 20001100309 is 90300110002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19908363409 + 92736900 = 141097^2 + 9630^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001100309 - 2²³ = 19992711701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001100292 and 20001100301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001100349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000550154 + 10000550155.

It is an arithmetic number, because the mean of its divisors is an integer number (10000550155).

Almost surely, 2^20001100309 is an apocalyptic number.

It is an amenable number.

20001100309 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001100309 is an equidigital number, since it uses as much as digits as its factorization.

20001100309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The spelling of 20001100309 in words is "twenty billion, one million, one hundred thousand, three hundred nine".