18220914 has 24 divisors (see below), whose sum is σ = 39561132. Its totient is φ = 6060960.

The previous prime is 18220897. The next prime is 18220919. The reversal of 18220914 is 41902281.

It can be written as a sum of positive squares in 2 ways, for example, as 16670889 + 1550025 = 4083^2 + 1245^2 .

It is not an unprimeable number, because it can be changed into a prime (18220919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12504 + ... + 13884.

Almost surely, 2^18220914 is an apocalyptic number.

18220914 is an abundant number, since it is smaller than the sum of its proper divisors (21340218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18220914 is a wasteful number, since it uses less digits than its factorization.

18220914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122 (or 2119 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18220914 is about 4268.5962563822. The cubic root of 18220914 is about 263.1419282425.

The spelling of 18220914 in words is "eighteen million, two hundred twenty thousand, nine hundred fourteen".