25818442 has 16 divisors (see below), whose sum is σ = 41803272. Its totient is φ = 11888640.

The previous prime is 25818409. The next prime is 25818451. The reversal of 25818442 is 24481852.

It can be written as a sum of positive squares in 4 ways, for example, as 25492401 + 326041 = 5049^2 + 571^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25818398 and 25818407.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14142 + ... + 15862.

Almost surely, 2^25818442 is an apocalyptic number.

25818442 is a deficient number, since it is larger than the sum of its proper divisors (15984830).

25818442 is a wasteful number, since it uses less digits than its factorization.

25818442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313.

The product of its digits is 20480, while the sum is 34.

The square root of 25818442 is about 5081.1850979865. The cubic root of 25818442 is about 295.5584251600.

The spelling of 25818442 in words is "twenty-five million, eight hundred eighteen thousand, four hundred forty-two".