18708043 has 4 divisors (see below), whose sum is σ = 18731440. Its totient is φ = 18684648.

The previous prime is 18708023. The next prime is 18708089. The reversal of 18708043 is 34080781.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18708043 is a prime.

It is a super-4 number, since 4×18708043⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18707996 and 18708014.

It is not an unprimeable number, because it can be changed into a prime (18708023) 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, 10455 + ... + 12112.

It is an arithmetic number, because the mean of its divisors is an integer number (4682860).

Almost surely, 2^18708043 is an apocalyptic number.

18708043 is a deficient number, since it is larger than the sum of its proper divisors (23397).

18708043 is an equidigital number, since it uses as much as digits as its factorization.

18708043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23396.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18708043 is about 4325.2795285392. The cubic root of 18708043 is about 265.4663344567.

The spelling of 18708043 in words is "eighteen million, seven hundred eight thousand, forty-three".