20308009009 has 2 divisors, whose sum is σ = 20308009010. Its totient is φ = 20308009008.

The previous prime is 20308009003. The next prime is 20308009019. The reversal of 20308009009 is 90090080302.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20200368384 + 107640625 = 142128^2 + 10375^2 .

It is a cyclic number.

It is not a de Polignac number, because 20308009009 - 2⁷ = 20308008881 is a prime.

It is not a weakly prime, because it can be changed into another prime (20308009003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10154004504 + 10154004505.

It is an arithmetic number, because the mean of its divisors is an integer number (10154004505).

Almost surely, 2^20308009009 is an apocalyptic number.

It is an amenable number.

20308009009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20308009009 is an equidigital number, since it uses as much as digits as its factorization.

20308009009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 20308009009 in words is "twenty billion, three hundred eight million, nine thousand, nine".