18214810 has 8 divisors (see below), whose sum is σ = 32786676. Its totient is φ = 7285920.

The previous prime is 18214799. The next prime is 18214811. The reversal of 18214810 is 1841281.

It can be written as a sum of positive squares in 2 ways, for example, as 16329681 + 1885129 = 4041^2 + 1373^2 .

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

It is a super-2 number, since 2×18214810² = 663558606672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18214811) 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, 910731 + ... + 910750.

Almost surely, 2^18214810 is an apocalyptic number.

18214810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18214810 is a deficient number, since it is larger than the sum of its proper divisors (14571866).

18214810 is a wasteful number, since it uses less digits than its factorization.

18214810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821488.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 18214810 is about 4267.8812073440. The cubic root of 18214810 is about 263.1125408085.

The spelling of 18214810 in words is "eighteen million, two hundred fourteen thousand, eight hundred ten".