20045203 has 4 divisors (see below), whose sum is σ = 20270520. Its totient is φ = 19819888.

The previous prime is 20045197. The next prime is 20045237. The reversal of 20045203 is 30254002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20045203 is a prime.

It is a super-2 number, since 2×20045203² = 803620326622418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20045243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112525 + ... + 112702.

It is an arithmetic number, because the mean of its divisors is an integer number (5067630).

Almost surely, 2^20045203 is an apocalyptic number.

20045203 is a deficient number, since it is larger than the sum of its proper divisors (225317).

20045203 is an equidigital number, since it uses as much as digits as its factorization.

20045203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225316.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 20045203 is about 4477.1869516472. The cubic root of 20045203 is about 271.6461074852.

Adding to 20045203 its reverse (30254002), we get a palindrome (50299205).

The spelling of 20045203 in words is "twenty million, forty-five thousand, two hundred three".