20452503 has 4 divisors (see below), whose sum is σ = 27270008. Its totient is φ = 13635000.

The previous prime is 20452499. The next prime is 20452519. The reversal of 20452503 is 30525402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20452503 - 2² = 20452499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20452503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20452573) 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 in 3 ways as a sum of consecutive naturals, for example, 3408748 + ... + 3408753.

It is an arithmetic number, because the mean of its divisors is an integer number (6817502).

Almost surely, 2^20452503 is an apocalyptic number.

20452503 is a deficient number, since it is larger than the sum of its proper divisors (6817505).

20452503 is an equidigital number, since it uses as much as digits as its factorization.

20452503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6817504.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20452503 is about 4522.4443611835. Note that the first 3 decimals coincide. The cubic root of 20452503 is about 273.4736507719.

Adding to 20452503 its reverse (30525402), we get a palindrome (50977905).

It can be divided in two parts, 2045250 and 3, that added together give a triangular number (2045253 = T₂₀₂₂).

The spelling of 20452503 in words is "twenty million, four hundred fifty-two thousand, five hundred three".