20566992337 has 2 divisors, whose sum is σ = 20566992338. Its totient is φ = 20566992336.

The previous prime is 20566992323. The next prime is 20566992359. The reversal of 20566992337 is 73329966502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19993677201 + 573315136 = 141399^2 + 23944^2 .

It is a cyclic number.

It is not a de Polignac number, because 20566992337 - 2⁷ = 20566992209 is a prime.

It is not a weakly prime, because it can be changed into another prime (20566992137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10283496168 + 10283496169.

It is an arithmetic number, because the mean of its divisors is an integer number (10283496169).

Almost surely, 2^20566992337 is an apocalyptic number.

It is an amenable number.

20566992337 is a deficient number, since it is larger than the sum of its proper divisors (1).

20566992337 is an equidigital number, since it uses as much as digits as its factorization.

20566992337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3674160, while the sum is 52.

The spelling of 20566992337 in words is "twenty billion, five hundred sixty-six million, nine hundred ninety-two thousand, three hundred thirty-seven".