20225313 has 6 divisors (see below), whose sum is σ = 29214354. Its totient is φ = 13483536.

The previous prime is 20225311. The next prime is 20225327. The reversal of 20225313 is 31352202.

It can be written as a sum of positive squares in only one way, i.e., 20223009 + 2304 = 4497^2 + 48^2 .

It is not a de Polignac number, because 20225313 - 2¹ = 20225311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20225311) 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 5 ways as a sum of consecutive naturals, for example, 1123620 + ... + 1123637.

It is an arithmetic number, because the mean of its divisors is an integer number (4869059).

Almost surely, 2^20225313 is an apocalyptic number.

It is an amenable number.

20225313 is a deficient number, since it is larger than the sum of its proper divisors (8989041).

20225313 is a wasteful number, since it uses less digits than its factorization.

20225313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247263 (or 2247260 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20225313 is about 4497.2561634846. The cubic root of 20225313 is about 272.4572802880.

Adding to 20225313 its reverse (31352202), we get a palindrome (51577515).

The spelling of 20225313 in words is "twenty million, two hundred twenty-five thousand, three hundred thirteen".