20325616 has 20 divisors (see below), whose sum is σ = 39542112. Its totient is φ = 10121216.

The previous prime is 20325581. The next prime is 20325619. The reversal of 20325616 is 61652302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20325619) 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, 1641 + ... + 6583.

Almost surely, 2^20325616 is an apocalyptic number.

It is an amenable number.

20325616 is a deficient number, since it is larger than the sum of its proper divisors (19216496).

20325616 is a wasteful number, since it uses less digits than its factorization.

20325616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5208 (or 5202 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20325616 is about 4508.3939490688. The cubic root of 20325616 is about 272.9069351411.

Adding to 20325616 its reverse (61652302), we get a palindrome (81977918).

The spelling of 20325616 in words is "twenty million, three hundred twenty-five thousand, six hundred sixteen".