18873712 has 80 divisors (see below), whose sum is σ = 43934688. Its totient is φ = 7741440.

The previous prime is 18873703. The next prime is 18873719. The reversal of 18873712 is 21737881.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18873719) 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, 166968 + ... + 167080.

Almost surely, 2^18873712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18873712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21967344).

18873712 is an abundant number, since it is smaller than the sum of its proper divisors (25060976).

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

18873712 is a wasteful number, since it uses less digits than its factorization.

18873712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 212 counting only the distinct ones).

The product of its digits is 18816, while the sum is 37.

The square root of 18873712 is about 4344.3885645738. The cubic root of 18873712 is about 266.2476446999.

The spelling of 18873712 in words is "eighteen million, eight hundred seventy-three thousand, seven hundred twelve".