18212341 has 4 divisors (see below), whose sum is σ = 20814112. Its totient is φ = 15610572.

The previous prime is 18212333. The next prime is 18212347. The reversal of 18212341 is 14321281.

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.

It is a cyclic number.

It is not a de Polignac number, because 18212341 - 2³ = 18212333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18212347) 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, 1300875 + ... + 1300888.

It is an arithmetic number, because the mean of its divisors is an integer number (5203528).

Almost surely, 2^18212341 is an apocalyptic number.

It is an amenable number.

18212341 is a deficient number, since it is larger than the sum of its proper divisors (2601771).

18212341 is an equidigital number, since it uses as much as digits as its factorization.

18212341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601770.

The product of its digits is 384, while the sum is 22.

The square root of 18212341 is about 4267.5919439422. The cubic root of 18212341 is about 263.1006520539.

The spelling of 18212341 in words is "eighteen million, two hundred twelve thousand, three hundred forty-one".