20225572 has 12 divisors (see below), whose sum is σ = 35528220. Its totient is φ = 10074656.

The previous prime is 20225561. The next prime is 20225573. The reversal of 20225572 is 27552202.

It can be written as a sum of positive squares in 2 ways, for example, as 8433216 + 11792356 = 2904^2 + 3434^2 .

It is not an unprimeable number, because it can be changed into a prime (20225573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8323 + ... + 10474.

It is an arithmetic number, because the mean of its divisors is an integer number (2960685).

Almost surely, 2^20225572 is an apocalyptic number.

It is an amenable number.

20225572 is a deficient number, since it is larger than the sum of its proper divisors (15302648).

20225572 is a wasteful number, since it uses less digits than its factorization.

20225572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19070 (or 19068 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 20225572 is about 4497.2849587279. The cubic root of 20225572 is about 272.4584432883.

Adding to 20225572 its reverse (27552202), we get a palindrome (47777774).

The spelling of 20225572 in words is "twenty million, two hundred twenty-five thousand, five hundred seventy-two".