20613325 has 12 divisors (see below), whose sum is σ = 25622740. Its totient is φ = 16450560.

The previous prime is 20613323. The next prime is 20613331. The reversal of 20613325 is 52331602.

It can be written as a sum of positive squares in 6 ways, for example, as 56169 + 20557156 = 237^2 + 4534^2 .

It is not a de Polignac number, because 20613325 - 2¹ = 20613323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20613296 and 20613305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20613323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13711 + ... + 15139.

Almost surely, 2^20613325 is an apocalyptic number.

20613325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20613325 is a deficient number, since it is larger than the sum of its proper divisors (5009415).

20613325 is a wasteful number, since it uses less digits than its factorization.

20613325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016 (or 2011 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 20613325 is about 4540.1899739989. The cubic root of 20613325 is about 274.1885723062.

Adding to 20613325 its reverse (52331602), we get a palindrome (72944927).

It can be divided in two parts, 206 and 13325, that added together give a palindrome (13531).

The spelling of 20613325 in words is "twenty million, six hundred thirteen thousand, three hundred twenty-five".