18116534 has 4 divisors (see below), whose sum is σ = 27174804. Its totient is φ = 9058266.

The previous prime is 18116533. The next prime is 18116537. The reversal of 18116534 is 43561181.

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

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 18116497 and 18116506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18116531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4529132 + ... + 4529135.

It is an arithmetic number, because the mean of its divisors is an integer number (6793701).

Almost surely, 2^18116534 is an apocalyptic number.

18116534 is a deficient number, since it is larger than the sum of its proper divisors (9058270).

18116534 is an equidigital number, since it uses as much as digits as its factorization.

18116534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9058269.

The product of its digits is 2880, while the sum is 29.

The square root of 18116534 is about 4256.3521940742. The cubic root of 18116534 is about 262.6384889795.

The spelling of 18116534 in words is "eighteen million, one hundred sixteen thousand, five hundred thirty-four".