18213141 has 4 divisors (see below), whose sum is σ = 24284192. Its totient is φ = 12142092.

The previous prime is 18213119. The next prime is 18213149. The reversal of 18213141 is 14131281.

It is a happy number.

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: 14131281 = 3 ⋅4710427.

It is not a de Polignac number, because 18213141 - 2⁹ = 18212629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18213149) 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, 3035521 + ... + 3035526.

It is an arithmetic number, because the mean of its divisors is an integer number (6071048).

Almost surely, 2^18213141 is an apocalyptic number.

It is an amenable number.

18213141 is a deficient number, since it is larger than the sum of its proper divisors (6071051).

18213141 is an equidigital number, since it uses as much as digits as its factorization.

18213141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6071050.

The product of its digits is 192, while the sum is 21.

The square root of 18213141 is about 4267.6856725865. The cubic root of 18213141 is about 263.1045043399.

The spelling of 18213141 in words is "eighteen million, two hundred thirteen thousand, one hundred forty-one".