20522453 has 4 divisors (see below), whose sum is σ = 23454240. Its totient is φ = 17590668.

The previous prime is 20522449. The next prime is 20522477. The reversal of 20522453 is 35422502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35422502 = 2 ⋅17711251.

It is a cyclic number.

It is not a de Polignac number, because 20522453 - 2² = 20522449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522423) 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 3 ways as a sum of consecutive naturals, for example, 1465883 + ... + 1465896.

It is an arithmetic number, because the mean of its divisors is an integer number (5863560).

Almost surely, 2^20522453 is an apocalyptic number.

It is an amenable number.

20522453 is a deficient number, since it is larger than the sum of its proper divisors (2931787).

20522453 is an equidigital number, since it uses as much as digits as its factorization.

20522453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931786.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20522453 is about 4530.1714095606. The cubic root of 20522453 is about 273.7850668505.

Adding to 20522453 its reverse (35422502), we get a palindrome (55944955).

The spelling of 20522453 in words is "twenty million, five hundred twenty-two thousand, four hundred fifty-three".