25980818 has 4 divisors (see below), whose sum is σ = 38971230. Its totient is φ = 12990408.

The previous prime is 25980803. The next prime is 25980833. The reversal of 25980818 is 81808952.

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

It is an interprime number because it is at equal distance from previous prime (25980803) and next prime (25980833).

It can be written as a sum of positive squares in only one way, i.e., 24571849 + 1408969 = 4957^2 + 1187^2 .

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, 6495203 + ... + 6495206.

Almost surely, 2^25980818 is an apocalyptic number.

25980818 is a deficient number, since it is larger than the sum of its proper divisors (12990412).

25980818 is a wasteful number, since it uses less digits than its factorization.

25980818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12990411.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 25980818 is about 5097.1382166859. The cubic root of 25980818 is about 296.1767343019.

The spelling of 25980818 in words is "twenty-five million, nine hundred eighty thousand, eight hundred eighteen".