18745252 has 24 divisors (see below), whose sum is σ = 34587000. Its totient is φ = 8875776.

The previous prime is 18745247. The next prime is 18745277. The reversal of 18745252 is 25254781.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1572516 + 17172736 = 1254^2 + 4144^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4624 + ... + 7672.

It is an arithmetic number, because the mean of its divisors is an integer number (1441125).

Almost surely, 2^18745252 is an apocalyptic number.

It is an amenable number.

18745252 is a deficient number, since it is larger than the sum of its proper divisors (15841748).

18745252 is a wasteful number, since it uses less digits than its factorization.

18745252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135 (or 3133 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 18745252 is about 4329.5787323942. The cubic root of 18745252 is about 265.6422159453.

The spelling of 18745252 in words is "eighteen million, seven hundred forty-five thousand, two hundred fifty-two".