20010323009 has 2 divisors, whose sum is σ = 20010323010. Its totient is φ = 20010323008.

The previous prime is 20010322903. The next prime is 20010323041. The reversal of 20010323009 is 90032301002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13752721984 + 6257601025 = 117272^2 + 79105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20010323009 is a prime.

It is not a weakly prime, because it can be changed into another prime (20010323209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005161504 + 10005161505.

It is an arithmetic number, because the mean of its divisors is an integer number (10005161505).

Almost surely, 2^20010323009 is an apocalyptic number.

It is an amenable number.

20010323009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010323009 is an equidigital number, since it uses as much as digits as its factorization.

20010323009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The spelling of 20010323009 in words is "twenty billion, ten million, three hundred twenty-three thousand, nine".