25940218 has 4 divisors (see below), whose sum is σ = 38910330. Its totient is φ = 12970108.

The previous prime is 25940209. The next prime is 25940221. The reversal of 25940218 is 81204952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25431849 + 508369 = 5043^2 + 713^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 25940218.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6485053 + ... + 6485056.

Almost surely, 2^25940218 is an apocalyptic number.

25940218 is a deficient number, since it is larger than the sum of its proper divisors (12970112).

25940218 is a wasteful number, since it uses less digits than its factorization.

25940218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12970111.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 25940218 is about 5093.1540326207. The cubic root of 25940218 is about 296.0223762607.

The spelling of 25940218 in words is "twenty-five million, nine hundred forty thousand, two hundred eighteen".