20253173 has 2 divisors, whose sum is σ = 20253174. Its totient is φ = 20253172.

The previous prime is 20253169. The next prime is 20253187. The reversal of 20253173 is 37135202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19518724 + 734449 = 4418^2 + 857^2 .

It is a cyclic number.

It is not a de Polignac number, because 20253173 - 2² = 20253169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20253073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10126586 + 10126587.

It is an arithmetic number, because the mean of its divisors is an integer number (10126587).

Almost surely, 2^20253173 is an apocalyptic number.

It is an amenable number.

20253173 is a deficient number, since it is larger than the sum of its proper divisors (1).

20253173 is an equidigital number, since it uses as much as digits as its factorization.

20253173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 20253173 is about 4500.3525417460. The cubic root of 20253173 is about 272.5823245360.

Adding to 20253173 its reverse (37135202), we get a palindrome (57388375).

The spelling of 20253173 in words is "twenty million, two hundred fifty-three thousand, one hundred seventy-three".