18863020 has 48 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 6806720.

The previous prime is 18862951. The next prime is 18863023. The reversal of 18863020 is 2036881.

It is a self number, because there is not a number n which added to its sum of digits gives 18863020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18863023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39141 + ... + 39619.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 2^18863020 is an apocalyptic number.

18863020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18863020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21772800).

18863020 is an abundant number, since it is smaller than the sum of its proper divisors (24682580).

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

18863020 is a wasteful number, since it uses less digits than its factorization.

18863020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18863020 is about 4343.1578373345. The cubic root of 18863020 is about 266.1973585745.

The spelling of 18863020 in words is "eighteen million, eight hundred sixty-three thousand, twenty".