25518538 has 16 divisors (see below), whose sum is σ = 38861856. Its totient is φ = 12566320.

The previous prime is 25518533. The next prime is 25518541. The reversal of 25518538 is 83581552.

It is a junction number, because it is equal to n+sod(n) for n = 25518497 and 25518506.

It is not an unprimeable number, because it can be changed into a prime (25518533) 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 7 ways as a sum of consecutive naturals, for example, 45045 + ... + 45607.

It is an arithmetic number, because the mean of its divisors is an integer number (2428866).

Almost surely, 2^25518538 is an apocalyptic number.

25518538 is a deficient number, since it is larger than the sum of its proper divisors (13343318).

25518538 is a wasteful number, since it uses less digits than its factorization.

25518538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869.

The product of its digits is 48000, while the sum is 37.

The square root of 25518538 is about 5051.5876712178. The cubic root of 25518538 is about 294.4095746162.

The spelling of 25518538 in words is "twenty-five million, five hundred eighteen thousand, five hundred thirty-eight".