20433245 has 12 divisors (see below), whose sum is σ = 28523484. Its totient is φ = 14011200.

The previous prime is 20433241. The next prime is 20433263. The reversal of 20433245 is 54233402.

It can be written as a sum of positive squares in 2 ways, for example, as 10686361 + 9746884 = 3269^2 + 3122^2 .

It is not a de Polignac number, because 20433245 - 2² = 20433241 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 20433245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20433241) 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, 41456 + ... + 41945.

It is an arithmetic number, because the mean of its divisors is an integer number (2376957).

Almost surely, 2^20433245 is an apocalyptic number.

It is an amenable number.

20433245 is a deficient number, since it is larger than the sum of its proper divisors (8090239).

20433245 is an equidigital number, since it uses as much as digits as its factorization.

20433245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83420 (or 83413 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 20433245 is about 4520.3147014340. The cubic root of 20433245 is about 273.3877898967.

Adding to 20433245 its reverse (54233402), we get a palindrome (74666647).

The spelling of 20433245 in words is "twenty million, four hundred thirty-three thousand, two hundred forty-five".