18873252 has 18 divisors (see below), whose sum is σ = 47707478. Its totient is φ = 6291072.

The previous prime is 18873227. The next prime is 18873299. The reversal of 18873252 is 25237881.

It can be written as a sum of positive squares in only one way, i.e., 18870336 + 2916 = 4344^2 + 54^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 524257 = 18873252 / (1 + 8 + 8 + 7 + 3 + 2 + 5 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 262093 + ... + 262164.

Almost surely, 2^18873252 is an apocalyptic number.

18873252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18873252 is an abundant number, since it is smaller than the sum of its proper divisors (28834226).

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

18873252 is a wasteful number, since it uses less digits than its factorization.

18873252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524267 (or 524262 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 18873252 is about 4344.3356223938. The cubic root of 18873252 is about 266.2454816399.

The spelling of 18873252 in words is "eighteen million, eight hundred seventy-three thousand, two hundred fifty-two".