18881152 has 32 divisors (see below), whose sum is σ = 39832020. Its totient is φ = 8884224.

The previous prime is 18881143. The next prime is 18881167. The reversal of 18881152 is 25118881.

It can be written as a sum of positive squares in 2 ways, for example, as 18870336 + 10816 = 4344^2 + 104^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2163 + ... + 6514.

Almost surely, 2^18881152 is an apocalyptic number.

It is an amenable number.

18881152 is an abundant number, since it is smaller than the sum of its proper divisors (20950868).

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

18881152 is an equidigital number, since it uses as much as digits as its factorization.

18881152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8708 (or 8696 counting only the distinct ones).

The product of its digits is 5120, while the sum is 34.

The square root of 18881152 is about 4345.2447572030. The cubic root of 18881152 is about 266.2826249632.

The spelling of 18881152 in words is "eighteen million, eight hundred eighty-one thousand, one hundred fifty-two".