20236625 has 16 divisors (see below), whose sum is σ = 25530960. Its totient is φ = 16012800.

The previous prime is 20236621. The next prime is 20236637. The reversal of 20236625 is 52663202.

It can be written as a sum of positive squares in 8 ways, for example, as 6723649 + 13512976 = 2593^2 + 3676^2 .

It is not a de Polignac number, because 20236625 - 2² = 20236621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20236594 and 20236603.

It is not an unprimeable number, because it can be changed into a prime (20236621) 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 15 ways as a sum of consecutive naturals, for example, 11291 + ... + 12959.

It is an arithmetic number, because the mean of its divisors is an integer number (1595685).

Almost surely, 2^20236625 is an apocalyptic number.

20236625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20236625 is a deficient number, since it is larger than the sum of its proper divisors (5294335).

20236625 is an equidigital number, since it uses as much as digits as its factorization.

20236625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1771 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 20236625 is about 4498.5136434160. The cubic root of 20236625 is about 272.5080658612.

Adding to 20236625 its reverse (52663202), we get a palindrome (72899827).

The spelling of 20236625 in words is "twenty million, two hundred thirty-six thousand, six hundred twenty-five".