18838141 has 4 divisors (see below), whose sum is σ = 21529312. Its totient is φ = 16146972.

The previous prime is 18838129. The next prime is 18838153. The reversal of 18838141 is 14183881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14183881 = 2963 ⋅4787.

It is an interprime number because it is at equal distance from previous prime (18838129) and next prime (18838153).

It is a cyclic number.

It is not a de Polignac number, because 18838141 - 2¹¹ = 18836093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18838097 and 18838106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18838121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1345575 + ... + 1345588.

It is an arithmetic number, because the mean of its divisors is an integer number (5382328).

Almost surely, 2^18838141 is an apocalyptic number.

It is an amenable number.

18838141 is a deficient number, since it is larger than the sum of its proper divisors (2691171).

18838141 is an equidigital number, since it uses as much as digits as its factorization.

18838141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2691170.

The product of its digits is 6144, while the sum is 34.

The square root of 18838141 is about 4340.2927320631. The cubic root of 18838141 is about 266.0802752044.

The spelling of 18838141 in words is "eighteen million, eight hundred thirty-eight thousand, one hundred forty-one".