18850081 has 4 divisors (see below), whose sum is σ = 18904752. Its totient is φ = 18795412.

The previous prime is 18850067. The next prime is 18850103. The reversal of 18850081 is 18005881.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18850081 - 2⁵ = 18850049 is a prime.

It is a super-2 number, since 2×18850081² = 710651107413122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18850031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26815 + ... + 27508.

It is an arithmetic number, because the mean of its divisors is an integer number (4726188).

Almost surely, 2^18850081 is an apocalyptic number.

It is an amenable number.

18850081 is a deficient number, since it is larger than the sum of its proper divisors (54671).

18850081 is an equidigital number, since it uses as much as digits as its factorization.

18850081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54670.

The product of its (nonzero) digits is 2560, while the sum is 31.

The square root of 18850081 is about 4341.6679974406. The cubic root of 18850081 is about 266.1364790429.

The spelling of 18850081 in words is "eighteen million, eight hundred fifty thousand, eighty-one".