20106253 has 2 divisors, whose sum is σ = 20106254. Its totient is φ = 20106252.

The previous prime is 20106227. The next prime is 20106283. The reversal of 20106253 is 35260102.

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., 10259209 + 9847044 = 3203^2 + 3138^2 .

It is a cyclic number.

It is not a de Polignac number, because 20106253 - 2⁹ = 20105741 is a prime.

It is a super-2 number, since 2×20106253² = 808522819400018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20106253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20106283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10053126 + 10053127.

It is an arithmetic number, because the mean of its divisors is an integer number (10053127).

Almost surely, 2^20106253 is an apocalyptic number.

It is an amenable number.

20106253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20106253 is an equidigital number, since it uses as much as digits as its factorization.

20106253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20106253 is about 4483.9996654772. Note that the first 3 decimals coincide. The cubic root of 20106253 is about 271.9216046059.

Adding to 20106253 its reverse (35260102), we get a palindrome (55366355).

The spelling of 20106253 in words is "twenty million, one hundred six thousand, two hundred fifty-three".