20015025 has 12 divisors (see below), whose sum is σ = 33091632. Its totient is φ = 10674640.

The previous prime is 20014993. The next prime is 20015029. The reversal of 20015025 is 52051002.

It is not a de Polignac number, because 20015025 - 2⁵ = 20014993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 20014995 and 20015013.

It is not an unprimeable number, because it can be changed into a prime (20015029) 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 11 ways as a sum of consecutive naturals, for example, 133359 + ... + 133508.

It is an arithmetic number, because the mean of its divisors is an integer number (2757636).

Almost surely, 2^20015025 is an apocalyptic number.

20015025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20015025 is a deficient number, since it is larger than the sum of its proper divisors (13076607).

20015025 is a wasteful number, since it uses less digits than its factorization.

20015025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266880 (or 266875 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 20015025 is about 4473.8154856900. The cubic root of 20015025 is about 271.5097181860.

Adding to 20015025 its reverse (52051002), we get a palindrome (72066027).

It can be divided in two parts, 200 and 15025, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 20015025 in words is "twenty million, fifteen thousand, twenty-five".