18002270 has 32 divisors (see below), whose sum is σ = 38072160. Its totient is φ = 6042240.

The previous prime is 18002249. The next prime is 18002273. The reversal of 18002270 is 7220081.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18002273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4865 + ... + 7724.

It is an arithmetic number, because the mean of its divisors is an integer number (1189755).

Almost surely, 2^18002270 is an apocalyptic number.

18002270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18002270 is an abundant number, since it is smaller than the sum of its proper divisors (20069890).

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

18002270 is a wasteful number, since it uses less digits than its factorization.

18002270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12620.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 18002270 is about 4242.9082007510. The cubic root of 18002270 is about 262.0851557781.

The spelling of 18002270 in words is "eighteen million, two thousand, two hundred seventy".