18242371 has 4 divisors (see below), whose sum is σ = 20848432. Its totient is φ = 15636312.

The previous prime is 18242359. The next prime is 18242423. The reversal of 18242371 is 17324281.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18242371 - 2¹³ = 18234179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18242671) 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, 1303020 + ... + 1303033.

It is an arithmetic number, because the mean of its divisors is an integer number (5212108).

Almost surely, 2^18242371 is an apocalyptic number.

18242371 is a deficient number, since it is larger than the sum of its proper divisors (2606061).

18242371 is an equidigital number, since it uses as much as digits as its factorization.

18242371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606060.

The product of its digits is 2688, while the sum is 28.

The square root of 18242371 is about 4271.1088724124. The cubic root of 18242371 is about 263.2451799503.

The spelling of 18242371 in words is "eighteen million, two hundred forty-two thousand, three hundred seventy-one".