18487141 has 4 divisors (see below), whose sum is σ = 18670284. Its totient is φ = 18304000.

The previous prime is 18487111. The next prime is 18487151. The reversal of 18487141 is 14178481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14178481 = 101 ⋅140381.

It can be written as a sum of positive squares in 2 ways, for example, as 16370116 + 2117025 = 4046^2 + 1455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18487141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18487097 and 18487106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18487111) 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, 91420 + ... + 91621.

It is an arithmetic number, because the mean of its divisors is an integer number (4667571).

Almost surely, 2^18487141 is an apocalyptic number.

It is an amenable number.

18487141 is a deficient number, since it is larger than the sum of its proper divisors (183143).

18487141 is a wasteful number, since it uses less digits than its factorization.

18487141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183142.

The product of its digits is 7168, while the sum is 34.

The square root of 18487141 is about 4299.6675452877. The cubic root of 18487141 is about 264.4173314023.

The spelling of 18487141 in words is "eighteen million, four hundred eighty-seven thousand, one hundred forty-one".