18518073 has 8 divisors (see below), whose sum is σ = 28218048. Its totient is φ = 10581744.

The previous prime is 18518069. The next prime is 18518081. The reversal of 18518073 is 37081581.

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

It is not a de Polignac number, because 18518073 - 2² = 18518069 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18518033) 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, 440886 + ... + 440927.

It is an arithmetic number, because the mean of its divisors is an integer number (3527256).

Almost surely, 2^18518073 is an apocalyptic number.

It is an amenable number.

18518073 is a deficient number, since it is larger than the sum of its proper divisors (9699975).

18518073 is an equidigital number, since it uses as much as digits as its factorization.

18518073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881823.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 18518073 is about 4303.2630642339. The cubic root of 18518073 is about 264.5647203280.

The spelling of 18518073 in words is "eighteen million, five hundred eighteen thousand, seventy-three".