18445257067 has 4 divisors (see below), whose sum is σ = 18445770576. Its totient is φ = 18444743560.

The previous prime is 18445257041. The next prime is 18445257073. The reversal of 18445257067 is 76075254481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76075254481 = 36919 ⋅2060599.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18445257067 is a prime.

It is a super-4 number, since 4×18445257067⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18445257067.

It is not an unprimeable number, because it can be changed into a prime (18445257037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198463 + ... + 276184.

It is an arithmetic number, because the mean of its divisors is an integer number (4611442644).

Almost surely, 2^18445257067 is an apocalyptic number.

18445257067 is a deficient number, since it is larger than the sum of its proper divisors (513509).

18445257067 is an equidigital number, since it uses as much as digits as its factorization.

18445257067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513508.

The product of its (nonzero) digits is 1881600, while the sum is 49.

The spelling of 18445257067 in words is "eighteen billion, four hundred forty-five million, two hundred fifty-seven thousand, sixty-seven".