18808058 has 4 divisors (see below), whose sum is σ = 28212090. Its totient is φ = 9404028.

The previous prime is 18808051. The next prime is 18808061. The reversal of 18808058 is 85080881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85080881 = 173 ⋅491797.

It can be written as a sum of positive squares in only one way, i.e., 13271449 + 5536609 = 3643^2 + 2353^2 .

It is a super-3 number, since 3×18808058³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18808051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4702013 + ... + 4702016.

Almost surely, 2^18808058 is an apocalyptic number.

18808058 is a deficient number, since it is larger than the sum of its proper divisors (9404032).

18808058 is an equidigital number, since it uses as much as digits as its factorization.

18808058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9404031.

The product of its (nonzero) digits is 20480, while the sum is 38.

The square root of 18808058 is about 4336.8257977466. The cubic root of 18808058 is about 265.9385634586.

The spelling of 18808058 in words is "eighteen million, eight hundred eight thousand, fifty-eight".