20445203 has 16 divisors (see below), whose sum is σ = 22654080. Its totient is φ = 18364416.

The previous prime is 20445193. The next prime is 20445223. The reversal of 20445203 is 30254402.

It is a cyclic number.

It is not a de Polignac number, because 20445203 - 2¹² = 20441107 is a prime.

It is a super-2 number, since 2×20445203² = 836012651422418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20445223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55526 + ... + 55892.

It is an arithmetic number, because the mean of its divisors is an integer number (1415880).

Almost surely, 2^20445203 is an apocalyptic number.

20445203 is a deficient number, since it is larger than the sum of its proper divisors (2208877).

20445203 is a wasteful number, since it uses less digits than its factorization.

20445203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20445203 is about 4521.6372034917. The cubic root of 20445203 is about 273.4411104155.

Adding to 20445203 its reverse (30254402), we get a palindrome (50699605).

The spelling of 20445203 in words is "twenty million, four hundred forty-five thousand, two hundred three".