20136625 has 8 divisors (see below), whose sum is σ = 25130664. Its totient is φ = 16109200.

The previous prime is 20136601. The next prime is 20136629. The reversal of 20136625 is 52663102.

It can be written as a sum of positive squares in 4 ways, for example, as 2972176 + 17164449 = 1724^2 + 4143^2 .

It is not a de Polignac number, because 20136625 - 2⁵ = 20136593 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20136625.

It is not an unprimeable number, because it can be changed into a prime (20136629) 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 7 ways as a sum of consecutive naturals, for example, 80422 + ... + 80671.

It is an arithmetic number, because the mean of its divisors is an integer number (3141333).

Almost surely, 2^20136625 is an apocalyptic number.

20136625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20136625 is a deficient number, since it is larger than the sum of its proper divisors (4994039).

20136625 is an equidigital number, since it uses as much as digits as its factorization.

20136625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161108 (or 161098 counting only the distinct ones).

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

The square root of 20136625 is about 4487.3850960220. The cubic root of 20136625 is about 272.0584550332.

Adding to 20136625 its reverse (52663102), we get a palindrome (72799727).

The spelling of 20136625 in words is "twenty million, one hundred thirty-six thousand, six hundred twenty-five".