25230660218 has 4 divisors (see below), whose sum is σ = 37845990330. Its totient is φ = 12615330108.

The previous prime is 25230660209. The next prime is 25230660251. The reversal of 25230660218 is 81206603252.

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., 19970494489 + 5260165729 = 141317^2 + 72527^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6307665053 + ... + 6307665056.

Almost surely, 2^25230660218 is an apocalyptic number.

25230660218 is a deficient number, since it is larger than the sum of its proper divisors (12615330112).

25230660218 is a wasteful number, since it uses less digits than its factorization.

25230660218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12615330111.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 25230660218 in words is "twenty-five billion, two hundred thirty million, six hundred sixty thousand, two hundred eighteen".