25018916 has 12 divisors (see below), whose sum is σ = 47151132. Its totient is φ = 11547168.

The previous prime is 25018907. The next prime is 25018921. The reversal of 25018916 is 61981052.

It can be written as a sum of positive squares in 2 ways, for example, as 6270016 + 18748900 = 2504^2 + 4330^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240515 + ... + 240618.

It is an arithmetic number, because the mean of its divisors is an integer number (3929261).

Almost surely, 2^25018916 is an apocalyptic number.

25018916 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25018916 is a deficient number, since it is larger than the sum of its proper divisors (22132216).

25018916 is a wasteful number, since it uses less digits than its factorization.

25018916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481150 (or 481148 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 25018916 is about 5001.8912423202. The cubic root of 25018916 is about 292.4755028550.

Adding to 25018916 its reverse (61981052), we get a palindrome (86999968).

The spelling of 25018916 in words is "twenty-five million, eighteen thousand, nine hundred sixteen".