18860218 has 8 divisors (see below), whose sum is σ = 30466548. Its totient is φ = 8704704.

The previous prime is 18860213. The next prime is 18860221. The reversal of 18860218 is 81206881.

It can be written as a sum of positive squares in 2 ways, for example, as 18636489 + 223729 = 4317^2 + 473^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18860213) 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, 362671 + ... + 362722.

Almost surely, 2^18860218 is an apocalyptic number.

18860218 is a deficient number, since it is larger than the sum of its proper divisors (11606330).

18860218 is a wasteful number, since it uses less digits than its factorization.

18860218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725408.

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 18860218 is about 4342.8352490050. The cubic root of 18860218 is about 266.1841771939.

It can be divided in two parts, 188 and 60218, that added together give a palindrome (60406).

The spelling of 18860218 in words is "eighteen million, eight hundred sixty thousand, two hundred eighteen".