18873330 has 96 divisors (see below), whose sum is σ = 54271296. Its totient is φ = 4185216.

The previous prime is 18873329. The next prime is 18873331. The reversal of 18873330 is 3337881.

It is an interprime number because it is at equal distance from previous prime (18873329) and next prime (18873331).

It is a junction number, because it is equal to n+sod(n) for n = 18873291 and 18873300.

It is not an unprimeable number, because it can be changed into a prime (18873331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54217 + ... + 54563.

It is an arithmetic number, because the mean of its divisors is an integer number (565326).

Almost surely, 2^18873330 is an apocalyptic number.

18873330 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 18873330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27135648).

18873330 is an abundant number, since it is smaller than the sum of its proper divisors (35397966).

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

18873330 is a wasteful number, since it uses less digits than its factorization.

18873330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 18873330 is about 4344.3445995915. The cubic root of 18873330 is about 266.2458484221.

The spelling of 18873330 in words is "eighteen million, eight hundred seventy-three thousand, three hundred thirty".