18979841 has 8 divisors (see below), whose sum is σ = 20092800. Its totient is φ = 17878320.

The previous prime is 18979817. The next prime is 18979901. The reversal of 18979841 is 14897981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18979841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18979801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680 + ... + 6198.

It is an arithmetic number, because the mean of its divisors is an integer number (2511600).

Almost surely, 2^18979841 is an apocalyptic number.

It is an amenable number.

18979841 is a deficient number, since it is larger than the sum of its proper divisors (1112959).

18979841 is a wasteful number, since it uses less digits than its factorization.

18979841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5719.

The product of its digits is 145152, while the sum is 47.

The square root of 18979841 is about 4356.5859339625. The cubic root of 18979841 is about 266.7457590045.

The spelling of 18979841 in words is "eighteen million, nine hundred seventy-nine thousand, eight hundred forty-one".