20166403273 has 2 divisors, whose sum is σ = 20166403274. Its totient is φ = 20166403272.

The previous prime is 20166403253. The next prime is 20166403307. The reversal of 20166403273 is 37230466102.

It is an a-pointer prime, because the next prime (20166403307) can be obtained adding 20166403273 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16799270544 + 3367132729 = 129612^2 + 58027^2 .

It is a cyclic number.

It is not a de Polignac number, because 20166403273 - 2⁵ = 20166403241 is a prime.

It is a super-2 number, since 2×20166403273² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20166403253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10083201636 + 10083201637.

It is an arithmetic number, because the mean of its divisors is an integer number (10083201637).

Almost surely, 2^20166403273 is an apocalyptic number.

It is an amenable number.

20166403273 is a deficient number, since it is larger than the sum of its proper divisors (1).

20166403273 is an equidigital number, since it uses as much as digits as its factorization.

20166403273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 34.

Adding to 20166403273 its reverse (37230466102), we get a palindrome (57396869375).

The spelling of 20166403273 in words is "twenty billion, one hundred sixty-six million, four hundred three thousand, two hundred seventy-three".