18687852 has 18 divisors (see below), whose sum is σ = 47238828. Its totient is φ = 6229272.

The previous prime is 18687821. The next prime is 18687859. The reversal of 18687852 is 25878681.

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

It is a junction number, because it is equal to n+sod(n) for n = 18687798 and 18687807.

It is not an unprimeable number, because it can be changed into a prime (18687859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 259518 + ... + 259589.

Almost surely, 2^18687852 is an apocalyptic number.

18687852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18687852 is an abundant number, since it is smaller than the sum of its proper divisors (28550976).

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

18687852 is a wasteful number, since it uses less digits than its factorization.

18687852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519117 (or 519112 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 18687852 is about 4322.9448296271. The cubic root of 18687852 is about 265.3707969345.

The spelling of 18687852 in words is "eighteen million, six hundred eighty-seven thousand, eight hundred fifty-two".