20323665337 has 2 divisors, whose sum is σ = 20323665338. Its totient is φ = 20323665336.

The previous prime is 20323665319. The next prime is 20323665371. The reversal of 20323665337 is 73356632302.

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., 15883308841 + 4440356496 = 126029^2 + 66636^2 .

It is a cyclic number.

It is not a de Polignac number, because 20323665337 - 2⁷ = 20323665209 is a prime.

It is a super-3 number, since 3×20323665337³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20323665337.

It is not a weakly prime, because it can be changed into another prime (20323665377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161832668 + 10161832669.

It is an arithmetic number, because the mean of its divisors is an integer number (10161832669).

Almost surely, 2^20323665337 is an apocalyptic number.

It is an amenable number.

20323665337 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323665337 is an equidigital number, since it uses as much as digits as its factorization.

20323665337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 40.

The spelling of 20323665337 in words is "twenty billion, three hundred twenty-three million, six hundred sixty-five thousand, three hundred thirty-seven".