1800218630 has 16 divisors (see below), whose sum is σ = 3703307040. Its totient is φ = 617217792.

The previous prime is 1800218627. The next prime is 1800218681. The reversal of 1800218630 is 368120081.

It is a junction number, because it is equal to n+sod(n) for n = 1800218593 and 1800218602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12858635 + ... + 12858774.

It is an arithmetic number, because the mean of its divisors is an integer number (231456690).

Almost surely, 2^1800218630 is an apocalyptic number.

1800218630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1800218630 is an abundant number, since it is smaller than the sum of its proper divisors (1903088410).

1800218630 is a wasteful number, since it uses less digits than its factorization.

1800218630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25717423.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 1800218630 is about 42428.9833722186. The cubic root of 1800218630 is about 1216.4896471883.

The spelling of 1800218630 in words is "one billion, eight hundred million, two hundred eighteen thousand, six hundred thirty".