18355214 has 4 divisors (see below), whose sum is σ = 27532824. Its totient is φ = 9177606.

The previous prime is 18355199. The next prime is 18355229. The reversal of 18355214 is 41255381.

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

It is an interprime number because it is at equal distance from previous prime (18355199) and next prime (18355229).

It is a super-4 number, since 4×18355214⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4588802 + ... + 4588805.

It is an arithmetic number, because the mean of its divisors is an integer number (6883206).

Almost surely, 2^18355214 is an apocalyptic number.

18355214 is a deficient number, since it is larger than the sum of its proper divisors (9177610).

18355214 is an equidigital number, since it uses as much as digits as its factorization.

18355214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9177609.

The product of its digits is 4800, while the sum is 29.

The square root of 18355214 is about 4284.2985423521. The cubic root of 18355214 is about 263.7868554324.

The spelling of 18355214 in words is "eighteen million, three hundred fifty-five thousand, two hundred fourteen".