18979241 has 4 divisors (see below), whose sum is σ = 18987972. Its totient is φ = 18970512.

The previous prime is 18979217. The next prime is 18979249. The reversal of 18979241 is 14297981.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6270016 + 12709225 = 2504^2 + 3565^2 .

It is a cyclic number.

It is not a de Polignac number, because 18979241 - 2¹⁰ = 18978217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18979249) 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, 1775 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (4746993).

Almost surely, 2^18979241 is an apocalyptic number.

It is an amenable number.

18979241 is a deficient number, since it is larger than the sum of its proper divisors (8731).

18979241 is an equidigital number, since it uses as much as digits as its factorization.

18979241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8730.

The product of its digits is 36288, while the sum is 41.

The square root of 18979241 is about 4356.5170721575. The cubic root of 18979241 is about 266.7429481425.

The spelling of 18979241 in words is "eighteen million, nine hundred seventy-nine thousand, two hundred forty-one".