20435445 has 24 divisors (see below), whose sum is σ = 37506456. Its totient is φ = 10257408.

The previous prime is 20435423. The next prime is 20435447. The reversal of 20435445 is 54453402.

It can be written as a sum of positive squares in 4 ways, for example, as 10284849 + 10150596 = 3207^2 + 3186^2 .

It is not a de Polignac number, because 20435445 - 2⁵ = 20435413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20435447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12592 + ... + 14121.

It is an arithmetic number, because the mean of its divisors is an integer number (1562769).

Almost surely, 2^20435445 is an apocalyptic number.

It is an amenable number.

20435445 is a deficient number, since it is larger than the sum of its proper divisors (17071011).

20435445 is a wasteful number, since it uses less digits than its factorization.

20435445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26741 (or 26738 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 20435445 is about 4520.5580407733. The cubic root of 20435445 is about 273.3976012206.

Adding to 20435445 its reverse (54453402), we get a palindrome (74888847).

The spelling of 20435445 in words is "twenty million, four hundred thirty-five thousand, four hundred forty-five".