20225594 has 4 divisors (see below), whose sum is σ = 30338394. Its totient is φ = 10112796.

The previous prime is 20225593. The next prime is 20225617. The reversal of 20225594 is 49552202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16851025 + 3374569 = 4105^2 + 1837^2 .

It is a super-3 number, since 3×20225594³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20225591) 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 as a sum of consecutive naturals, namely, 5056397 + ... + 5056400.

Almost surely, 2^20225594 is an apocalyptic number.

20225594 is a deficient number, since it is larger than the sum of its proper divisors (10112800).

20225594 is a wasteful number, since it uses less digits than its factorization.

20225594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10112799.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 20225594 is about 4497.2874046474. The cubic root of 20225594 is about 272.4585420755.

Adding to 20225594 its reverse (49552202), we get a palindrome (69777796).

The spelling of 20225594 in words is "twenty million, two hundred twenty-five thousand, five hundred ninety-four".