18525914387 has 2 divisors, whose sum is σ = 18525914388. Its totient is φ = 18525914386.

The previous prime is 18525914369. The next prime is 18525914389. The reversal of 18525914387 is 78341952581.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18525914387 - 2²⁰ = 18524865811 is a prime.

Together with 18525914389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18525914389) by changing a digit.

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, 9262957193 + 9262957194.

It is an arithmetic number, because the mean of its divisors is an integer number (9262957194).

Almost surely, 2^18525914387 is an apocalyptic number.

18525914387 is a deficient number, since it is larger than the sum of its proper divisors (1).

18525914387 is an equidigital number, since it uses as much as digits as its factorization.

18525914387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 53.

The spelling of 18525914387 in words is "eighteen billion, five hundred twenty-five million, nine hundred fourteen thousand, three hundred eighty-seven".