20522233 has 4 divisors (see below), whose sum is σ = 21414528. Its totient is φ = 19629940.

The previous prime is 20522219. The next prime is 20522239. The reversal of 20522233 is 33222502.

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.

It is a cyclic number.

It is not a de Polignac number, because 20522233 - 2¹³ = 20514041 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 20522233.

It is not an unprimeable number, because it can be changed into a prime (20522239) 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, 446113 + ... + 446158.

It is an arithmetic number, because the mean of its divisors is an integer number (5353632).

Almost surely, 2^20522233 is an apocalyptic number.

20522233 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20522233 is a deficient number, since it is larger than the sum of its proper divisors (892295).

20522233 is an equidigital number, since it uses as much as digits as its factorization.

20522233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892294.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20522233 is about 4530.1471278536. The cubic root of 20522233 is about 273.7840885248.

Adding to 20522233 its reverse (33222502), we get a palindrome (53744735).

The spelling of 20522233 in words is "twenty million, five hundred twenty-two thousand, two hundred thirty-three".