18425251087 has 2 divisors, whose sum is σ = 18425251088. Its totient is φ = 18425251086.

The previous prime is 18425251063. The next prime is 18425251147. The reversal of 18425251087 is 78015252481.

It is a weak prime.

It is an emirp because it is prime and its reverse (78015252481) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18425251087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18425251037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9212625543 + 9212625544.

It is an arithmetic number, because the mean of its divisors is an integer number (9212625544).

Almost surely, 2^18425251087 is an apocalyptic number.

18425251087 is a deficient number, since it is larger than the sum of its proper divisors (1).

18425251087 is an equidigital number, since it uses as much as digits as its factorization.

18425251087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 179200, while the sum is 43.

The spelling of 18425251087 in words is "eighteen billion, four hundred twenty-five million, two hundred fifty-one thousand, eighty-seven".