18630620 has 24 divisors (see below), whose sum is σ = 39768288. Its totient is φ = 7329600.

The previous prime is 18630593. The next prime is 18630629. The reversal of 18630620 is 2603681.

It is a self number, because there is not a number n which added to its sum of digits gives 18630620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18630629) by changing a digit.

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, 6416 + ... + 8855.

It is an arithmetic number, because the mean of its divisors is an integer number (1657012).

Almost surely, 2^18630620 is an apocalyptic number.

18630620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18630620 is an abundant number, since it is smaller than the sum of its proper divisors (21137668).

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

18630620 is a wasteful number, since it uses less digits than its factorization.

18630620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15341 (or 15339 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 18630620 is about 4316.3201920154. The cubic root of 18630620 is about 265.0996184149.

The spelling of 18630620 in words is "eighteen million, six hundred thirty thousand, six hundred twenty".