20168573 has 2 divisors, whose sum is σ = 20168574. Its totient is φ = 20168572.

The previous prime is 20168527. The next prime is 20168581. The reversal of 20168573 is 37586102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18852964 + 1315609 = 4342^2 + 1147^2 .

It is a cyclic number.

It is not a de Polignac number, because 20168573 - 2⁶ = 20168509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20168503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10084286 + 10084287.

It is an arithmetic number, because the mean of its divisors is an integer number (10084287).

Almost surely, 2^20168573 is an apocalyptic number.

It is an amenable number.

20168573 is a deficient number, since it is larger than the sum of its proper divisors (1).

20168573 is an equidigital number, since it uses as much as digits as its factorization.

20168573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 20168573 is about 4490.9434420843. The cubic root of 20168573 is about 272.2022581932.

The spelling of 20168573 in words is "twenty million, one hundred sixty-eight thousand, five hundred seventy-three".