20982503 has 2 divisors, whose sum is σ = 20982504. Its totient is φ = 20982502.

The previous prime is 20982499. The next prime is 20982553. The reversal of 20982503 is 30528902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20982503 - 2² = 20982499 is a prime.

It is a super-3 number, since 3×20982503³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20982553) 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, 10491251 + 10491252.

It is an arithmetic number, because the mean of its divisors is an integer number (10491252).

Almost surely, 2^20982503 is an apocalyptic number.

20982503 is a deficient number, since it is larger than the sum of its proper divisors (1).

20982503 is an equidigital number, since it uses as much as digits as its factorization.

20982503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 20982503 is about 4580.6662179207. Note that the first 3 decimals coincide. The cubic root of 20982503 is about 275.8157727026.

The spelling of 20982503 in words is "twenty million, nine hundred eighty-two thousand, five hundred three".