18270161 has 8 divisors (see below), whose sum is σ = 22486464. Its totient is φ = 14455440.

The previous prime is 18270151. The next prime is 18270173. The reversal of 18270161 is 16107281.

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 18270161 - 2⁶ = 18270097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18270161.

It is not an unprimeable number, because it can be changed into a prime (18270101) 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 in 7 ways as a sum of consecutive naturals, for example, 100295 + ... + 100476.

It is an arithmetic number, because the mean of its divisors is an integer number (2810808).

Almost surely, 2^18270161 is an apocalyptic number.

It is an amenable number.

18270161 is a deficient number, since it is larger than the sum of its proper divisors (4216303).

18270161 is a wasteful number, since it uses less digits than its factorization.

18270161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200791.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 18270161 is about 4274.3608878989. The cubic root of 18270161 is about 263.3787859729.

The spelling of 18270161 in words is "eighteen million, two hundred seventy thousand, one hundred sixty-one".