20525416 has 16 divisors (see below), whose sum is σ = 39212100. Its totient is φ = 10068864.

The previous prime is 20525413. The next prime is 20525419. The reversal of 20525416 is 61452502.

It is an interprime number because it is at equal distance from previous prime (20525413) and next prime (20525419).

It can be written as a sum of positive squares in 2 ways, for example, as 15920100 + 4605316 = 3990^2 + 2146^2 .

It is not an unprimeable number, because it can be changed into a prime (20525411) 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, 23781 + ... + 24628.

Almost surely, 2^20525416 is an apocalyptic number.

It is an amenable number.

20525416 is a deficient number, since it is larger than the sum of its proper divisors (18686684).

20525416 is a wasteful number, since it uses less digits than its factorization.

20525416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48468 (or 48464 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 20525416 is about 4530.4984273256. The cubic root of 20525416 is about 273.7982424378.

Adding to 20525416 its reverse (61452502), we get a palindrome (81977918).

The spelling of 20525416 in words is "twenty million, five hundred twenty-five thousand, four hundred sixteen".