20522445 has 8 divisors (see below), whose sum is σ = 32835936. Its totient is φ = 10945296.

The previous prime is 20522429. The next prime is 20522449. The reversal of 20522445 is 54422502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20522445 - 2⁴ = 20522429 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684067 + ... + 684096.

It is an arithmetic number, because the mean of its divisors is an integer number (4104492).

Almost surely, 2^20522445 is an apocalyptic number.

It is an amenable number.

20522445 is a deficient number, since it is larger than the sum of its proper divisors (12313491).

20522445 is a wasteful number, since it uses less digits than its factorization.

20522445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368171.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20522445 is about 4530.1705265917. The cubic root of 20522445 is about 273.7850312751.

Adding to 20522445 its reverse (54422502), we get a palindrome (74944947).

The spelling of 20522445 in words is "twenty million, five hundred twenty-two thousand, four hundred forty-five".