20725036 has 12 divisors (see below), whose sum is σ = 36421000. Its totient is φ = 10319040.

The previous prime is 20725013. The next prime is 20725037. The reversal of 20725036 is 63052702.

It is a self number, because there is not a number n which added to its sum of digits gives 20725036.

It is not an unprimeable number, because it can be changed into a prime (20725037) 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 in 3 ways as a sum of consecutive naturals, for example, 9786 + ... + 11713.

Almost surely, 2^20725036 is an apocalyptic number.

It is an amenable number.

20725036 is a deficient number, since it is larger than the sum of its proper divisors (15695964).

20725036 is a wasteful number, since it uses less digits than its factorization.

20725036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21744 (or 21742 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20725036 is about 4552.4758099302. The cubic root of 20725036 is about 274.6829889704.

Adding to 20725036 its reverse (63052702), we get a palindrome (83777738).

The spelling of 20725036 in words is "twenty million, seven hundred twenty-five thousand, thirty-six".