20018025 has 18 divisors (see below), whose sum is σ = 35854910. Its totient is φ = 10676160.

The previous prime is 20018021. The next prime is 20018069. The reversal of 20018025 is 52081002.

It can be written as a sum of positive squares in 3 ways, for example, as 2277081 + 17740944 = 1509^2 + 4212^2 .

It is not a de Polignac number, because 20018025 - 2² = 20018021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20017989 and 20018007.

It is not an unprimeable number, because it can be changed into a prime (20018021) 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 17 ways as a sum of consecutive naturals, for example, 44260 + ... + 44709.

Almost surely, 2^20018025 is an apocalyptic number.

20018025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20018025 is a deficient number, since it is larger than the sum of its proper divisors (15836885).

20018025 is a wasteful number, since it uses less digits than its factorization.

20018025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88985 (or 88977 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 20018025 is about 4474.1507574064. The cubic root of 20018025 is about 271.5232828033.

Adding to 20018025 its reverse (52081002), we get a palindrome (72099027).

It can be divided in two parts, 200 and 18025, that added together give a square (18225 = 135²).

The spelling of 20018025 in words is "twenty million, eighteen thousand, twenty-five".