20126503 has 2 divisors, whose sum is σ = 20126504. Its totient is φ = 20126502.

The previous prime is 20126497. The next prime is 20126507. The reversal of 20126503 is 30562102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20126503 - 2⁹ = 20125991 is a prime.

It is a super-2 number, since 2×20126503² = 810152246018018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20126507) 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, 10063251 + 10063252.

It is an arithmetic number, because the mean of its divisors is an integer number (10063252).

Almost surely, 2^20126503 is an apocalyptic number.

20126503 is a deficient number, since it is larger than the sum of its proper divisors (1).

20126503 is an equidigital number, since it uses as much as digits as its factorization.

20126503 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 20126503 is about 4486.2571259347. The cubic root of 20126503 is about 272.0128625333.

Adding to 20126503 its reverse (30562102), we get a palindrome (50688605).

It can be divided in two parts, 2012 and 6503, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 20126503 in words is "twenty million, one hundred twenty-six thousand, five hundred three".