25042018 has 4 divisors (see below), whose sum is σ = 37563030. Its totient is φ = 12521008.

The previous prime is 25042001. The next prime is 25042033. The reversal of 25042018 is 81024052.

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., 16024009 + 9018009 = 4003^2 + 3003^2 .

It is a Smith number, since the sum of its digits (22) 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 25042018.

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 as a sum of consecutive naturals, namely, 6260503 + ... + 6260506.

Almost surely, 2^25042018 is an apocalyptic number.

25042018 is a deficient number, since it is larger than the sum of its proper divisors (12521012).

25042018 is a wasteful number, since it uses less digits than its factorization.

25042018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12521011.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 25042018 is about 5004.2000359698. The cubic root of 25042018 is about 292.5654973008.

The spelling of 25042018 in words is "twenty-five million, forty-two thousand, eighteen".