18865152 has 132 divisors (see below), whose sum is σ = 57479760. Its totient is φ = 5947392.

The previous prime is 18865151. The next prime is 18865159. The reversal of 18865152 is 25156881.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18865151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211924 + ... + 212012.

Almost surely, 2^18865152 is an apocalyptic number.

18865152 is a gapful number since it is divisible by the number (12) 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 18865152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28739880).

18865152 is an abundant number, since it is smaller than the sum of its proper divisors (38614608).

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

18865152 is a wasteful number, since it uses less digits than its factorization.

18865152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 117 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 18865152 is about 4343.4032739316. The cubic root of 18865152 is about 266.2073872158.

The spelling of 18865152 in words is "eighteen million, eight hundred sixty-five thousand, one hundred fifty-two".