18280071 has 24 divisors (see below), whose sum is σ = 28332720. Its totient is φ = 11321856.

The previous prime is 18280069. The next prime is 18280099. The reversal of 18280071 is 17008281.

It is not a de Polignac number, because 18280071 - 2¹ = 18280069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18280051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8055 + ... + 10071.

It is an arithmetic number, because the mean of its divisors is an integer number (1180530).

Almost surely, 2^18280071 is an apocalyptic number.

18280071 is a deficient number, since it is larger than the sum of its proper divisors (10052649).

18280071 is a wasteful number, since it uses less digits than its factorization.

18280071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095 (or 2092 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 18280071 is about 4275.5199683781. The cubic root of 18280071 is about 263.4263975218.

The spelling of 18280071 in words is "eighteen million, two hundred eighty thousand, seventy-one".