18145667 has 8 divisors (see below), whose sum is σ = 18391200. Its totient is φ = 17902080.

The previous prime is 18145661. The next prime is 18145691. The reversal of 18145667 is 76654181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18145667 - 2¹⁴ = 18129283 is a prime.

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 18145667.

It is not an unprimeable number, because it can be changed into a prime (18145661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28442 + ... + 29072.

It is an arithmetic number, because the mean of its divisors is an integer number (2298900).

Almost surely, 2^18145667 is an apocalyptic number.

18145667 is a deficient number, since it is larger than the sum of its proper divisors (245533).

18145667 is a wasteful number, since it uses less digits than its factorization.

18145667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973.

The product of its digits is 40320, while the sum is 38.

The square root of 18145667 is about 4259.7731160239. The cubic root of 18145667 is about 262.7791956098.

The spelling of 18145667 in words is "eighteen million, one hundred forty-five thousand, six hundred sixty-seven".