18432630 has 64 divisors (see below), whose sum is σ = 49533120. Its totient is φ = 4877568.

The previous prime is 18432629. The next prime is 18432647. The reversal of 18432630 is 3623481.

It is a happy number.

It is a super-3 number, since 3×18432630³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18432594 and 18432603.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 62764 + ... + 63056.

It is an arithmetic number, because the mean of its divisors is an integer number (773955).

Almost surely, 2^18432630 is an apocalyptic number.

18432630 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 18432630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24766560).

18432630 is an abundant number, since it is smaller than the sum of its proper divisors (31100490).

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

18432630 is a wasteful number, since it uses less digits than its factorization.

18432630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 18432630 is about 4293.3238871532. The cubic root of 18432630 is about 264.1571894464.

The spelling of 18432630 in words is "eighteen million, four hundred thirty-two thousand, six hundred thirty".