18270071 has 4 divisors (see below), whose sum is σ = 18292200. Its totient is φ = 18247944.

The previous prime is 18270061. The next prime is 18270079. The reversal of 18270071 is 17007281.

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

It is a cyclic number.

It is not a de Polignac number, because 18270071 - 2¹⁴ = 18253687 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 18270071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18270079) 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, 9776 + ... + 11493.

It is an arithmetic number, because the mean of its divisors is an integer number (4573050).

Almost surely, 2^18270071 is an apocalyptic number.

18270071 is a deficient number, since it is larger than the sum of its proper divisors (22129).

18270071 is an equidigital number, since it uses as much as digits as its factorization.

18270071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22128.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 18270071 is about 4274.3503599962. The cubic root of 18270071 is about 263.3783534985.

The spelling of 18270071 in words is "eighteen million, two hundred seventy thousand, seventy-one".