18525069967 has 4 divisors (see below), whose sum is σ = 18602580960. Its totient is φ = 18447558976.

The previous prime is 18525069923. The next prime is 18525069973. The reversal of 18525069967 is 76996052581.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18525069967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18525064967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38755138 + ... + 38755615.

It is an arithmetic number, because the mean of its divisors is an integer number (4650645240).

Almost surely, 2^18525069967 is an apocalyptic number.

18525069967 is a deficient number, since it is larger than the sum of its proper divisors (77510993).

18525069967 is an equidigital number, since it uses as much as digits as its factorization.

18525069967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77510992.

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 18525069967 in words is "eighteen billion, five hundred twenty-five million, sixty-nine thousand, nine hundred sixty-seven".