47018 has 4 divisors (see below), whose sum is σ = 70530. Its totient is φ = 23508.

The previous prime is 47017. The next prime is 47041. The reversal of 47018 is 81074.

47018 = 57² + 58² + ... + 68².

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 26569 + 20449 = 163^2 + 143^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (47017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11753 + ... + 11756.

2⁴⁷⁰¹⁸ is an apocalyptic number.

47018 is a deficient number, since it is larger than the sum of its proper divisors (23512).

47018 is a wasteful number, since it uses less digits than its factorization.

47018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23511.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 47018 is about 216.8363438172. The cubic root of 47018 is about 36.0928672254.

The spelling of 47018 in words is "forty-seven thousand, eighteen".