18871241 has 8 divisors (see below), whose sum is σ = 20094984. Its totient is φ = 17660160.

The previous prime is 18871231. The next prime is 18871261. The reversal of 18871241 is 14217881.

It can be written as a sum of positive squares in 4 ways, for example, as 4393216 + 14478025 = 2096^2 + 3805^2 .

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 18871241 - 2¹⁰ = 18870217 is a prime.

It is a super-2 number, since 2×18871241² = 712247473760162, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18871198 and 18871207.

It is not an unprimeable number, because it can be changed into a prime (18871211) 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, 11 + ... + 6143.

It is an arithmetic number, because the mean of its divisors is an integer number (2511873).

Almost surely, 2^18871241 is an apocalyptic number.

It is an amenable number.

18871241 is a deficient number, since it is larger than the sum of its proper divisors (1223743).

18871241 is a wasteful number, since it uses less digits than its factorization.

18871241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6331.

The product of its digits is 3584, while the sum is 32.

The square root of 18871241 is about 4344.1041654178. The cubic root of 18871241 is about 266.2360248934.

The spelling of 18871241 in words is "eighteen million, eight hundred seventy-one thousand, two hundred forty-one".