20249903 has 12 divisors (see below), whose sum is σ = 21125520. Its totient is φ = 19406112.

The previous prime is 20249893. The next prime is 20249963. The reversal of 20249903 is 30994202.

It is not a de Polignac number, because 20249903 - 2¹² = 20245807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20249963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196550 + ... + 196652.

It is an arithmetic number, because the mean of its divisors is an integer number (1760460).

Almost surely, 2^20249903 is an apocalyptic number.

20249903 is a deficient number, since it is larger than the sum of its proper divisors (875617).

20249903 is an equidigital number, since it uses as much as digits as its factorization.

20249903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20249903 is about 4499.9892222093. The cubic root of 20249903 is about 272.5676537125.

It can be divided in two parts, 202 and 49903, that added together give a palindrome (50105).

The spelling of 20249903 in words is "twenty million, two hundred forty-nine thousand, nine hundred three".