18518941 has 8 divisors (see below), whose sum is σ = 21201344. Its totient is φ = 15845760.

The previous prime is 18518917. The next prime is 18518953. The reversal of 18518941 is 14981581.

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

It is not a de Polignac number, because 18518941 - 2⁷ = 18518813 is a prime.

It is a super-2 number, since 2×18518941² = 685902351522962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18518941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18518341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2746 + ... + 6676.

It is an arithmetic number, because the mean of its divisors is an integer number (2650168).

Almost surely, 2^18518941 is an apocalyptic number.

It is an amenable number.

18518941 is a deficient number, since it is larger than the sum of its proper divisors (2682403).

18518941 is an equidigital number, since it uses as much as digits as its factorization.

18518941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4611.

The product of its digits is 11520, while the sum is 37.

The square root of 18518941 is about 4303.3639167516. The cubic root of 18518941 is about 264.5688539220.

The spelling of 18518941 in words is "eighteen million, five hundred eighteen thousand, nine hundred forty-one".