18102630 has 128 divisors (see below), whose sum is σ = 56448000. Its totient is φ = 3608064.

The previous prime is 18102589. The next prime is 18102631. The reversal of 18102630 is 3620181.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18102597 and 18102606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18102631) 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 63 ways as a sum of consecutive naturals, for example, 51696 + ... + 52044.

It is an arithmetic number, because the mean of its divisors is an integer number (441000).

Almost surely, 2^18102630 is an apocalyptic number.

18102630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18102630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28224000).

18102630 is an abundant number, since it is smaller than the sum of its proper divisors (38345370).

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

18102630 is a wasteful number, since it uses less digits than its factorization.

18102630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 18102630 is about 4254.7185570846. The cubic root of 18102630 is about 262.5712822288.

The spelling of 18102630 in words is "eighteen million, one hundred two thousand, six hundred thirty".