20243445 has 16 divisors (see below), whose sum is σ = 32451840. Its totient is φ = 10775744.

The previous prime is 20243407. The next prime is 20243467. The reversal of 20243445 is 54434202.

It is a cyclic number.

It is not a de Polignac number, because 20243445 - 2¹⁶ = 20177909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9847 + ... + 11723.

It is an arithmetic number, because the mean of its divisors is an integer number (2028240).

Almost surely, 2^20243445 is an apocalyptic number.

It is an amenable number.

20243445 is a deficient number, since it is larger than the sum of its proper divisors (12208395).

20243445 is a wasteful number, since it uses less digits than its factorization.

20243445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 20243445 is about 4499.2716077161. The cubic root of 20243445 is about 272.5386753175.

Adding to 20243445 its reverse (54434202), we get a palindrome (74677647).

The spelling of 20243445 in words is "twenty million, two hundred forty-three thousand, four hundred forty-five".