19218841 has 8 divisors (see below), whose sum is σ = 19485824. Its totient is φ = 18954000.

The previous prime is 19218839. The next prime is 19218847. The reversal of 19218841 is 14881291.

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

It is a cyclic number.

It is not a de Polignac number, because 19218841 - 2¹ = 19218839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19218797 and 19218806.

It is not an unprimeable number, because it can be changed into a prime (19218847) 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, 25216 + ... + 25966.

It is an arithmetic number, because the mean of its divisors is an integer number (2435728).

Almost surely, 2^19218841 is an apocalyptic number.

It is an amenable number.

19218841 is a deficient number, since it is larger than the sum of its proper divisors (266983).

19218841 is a wasteful number, since it uses less digits than its factorization.

19218841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071.

The product of its digits is 4608, while the sum is 34.

The square root of 19218841 is about 4383.9298580155. The cubic root of 19218841 is about 267.8607401913.

The spelling of 19218841 in words is "nineteen million, two hundred eighteen thousand, eight hundred forty-one".