25902018 has 40 divisors (see below), whose sum is σ = 58348620. Its totient is φ = 8588160.

The previous prime is 25902013. The next prime is 25902043. The reversal of 25902018 is 81020952.

It can be written as a sum of positive squares in 2 ways, for example, as 25674489 + 227529 = 5067^2 + 477^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 25901982 and 25902000.

It is not an unprimeable number, because it can be changed into a prime (25902013) 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 19 ways as a sum of consecutive naturals, for example, 45238 + ... + 45806.

Almost surely, 2^25902018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25902018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29174310).

25902018 is an abundant number, since it is smaller than the sum of its proper divisors (32446602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25902018 is a wasteful number, since it uses less digits than its factorization.

25902018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 855 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 25902018 is about 5089.4025189604. The cubic root of 25902018 is about 295.8769957023.

The spelling of 25902018 in words is "twenty-five million, nine hundred two thousand, eighteen".