18864412 has 36 divisors (see below), whose sum is σ = 38798760. Its totient is φ = 8001504.

The previous prime is 18864409. The next prime is 18864427. The reversal of 18864412 is 21446881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20923 + ... + 21805.

Almost surely, 2^18864412 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 18864412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19399380).

18864412 is an abundant number, since it is smaller than the sum of its proper divisors (19934348).

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

18864412 is a wasteful number, since it uses less digits than its factorization.

18864412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010 (or 1001 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 18864412 is about 4343.3180864404. The cubic root of 18864412 is about 266.2039064410.

The spelling of 18864412 in words is "eighteen million, eight hundred sixty-four thousand, four hundred twelve".