20115025 has 24 divisors (see below), whose sum is σ = 28748160. Its totient is φ = 13676160.

The previous prime is 20115023. The next prime is 20115031. The reversal of 20115025 is 52051102.

It is not a de Polignac number, because 20115025 - 2¹ = 20115023 is a prime.

It is a super-2 number, since 2×20115025² = 809228461501250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115023) 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 23 ways as a sum of consecutive naturals, for example, 23556 + ... + 24394.

It is an arithmetic number, because the mean of its divisors is an integer number (1197840).

Almost surely, 2^20115025 is an apocalyptic number.

20115025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20115025 is a deficient number, since it is larger than the sum of its proper divisors (8633135).

20115025 is a wasteful number, since it uses less digits than its factorization.

20115025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 988 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 20115025 is about 4484.9777034005. The cubic root of 20115025 is about 271.9611437070.

Adding to 20115025 its reverse (52051102), we get a palindrome (72166127).

The spelling of 20115025 in words is "twenty million, one hundred fifteen thousand, twenty-five".