18220714 has 4 divisors (see below), whose sum is σ = 27331074. Its totient is φ = 9110356.

The previous prime is 18220693. The next prime is 18220733. The reversal of 18220714 is 41702281.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 12852225 + 5368489 = 3585^2 + 2317^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4555177 + ... + 4555180.

Almost surely, 2^18220714 is an apocalyptic number.

18220714 is a deficient number, since it is larger than the sum of its proper divisors (9110360).

18220714 is an equidigital number, since it uses as much as digits as its factorization.

18220714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9110359.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 18220714 is about 4268.5728294127. The cubic root of 18220714 is about 263.1409654555.

Adding to 18220714 its reverse (41702281), we get a palindrome (59922995).

The spelling of 18220714 in words is "eighteen million, two hundred twenty thousand, seven hundred fourteen".