18820252 has 12 divisors (see below), whose sum is σ = 35929656. Its totient is φ = 8554640.

The previous prime is 18820213. The next prime is 18820253. The reversal of 18820252 is 25202881.

It is a self number, because there is not a number n which added to its sum of digits gives 18820252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18820253) 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 3 ways as a sum of consecutive naturals, for example, 213823 + ... + 213910.

It is an arithmetic number, because the mean of its divisors is an integer number (2994138).

Almost surely, 2^18820252 is an apocalyptic number.

It is an amenable number.

18820252 is a deficient number, since it is larger than the sum of its proper divisors (17109404).

18820252 is a wasteful number, since it uses less digits than its factorization.

18820252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427748 (or 427746 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 18820252 is about 4338.2314368876. The cubic root of 18820252 is about 265.9960238349.

The spelling of 18820252 in words is "eighteen million, eight hundred twenty thousand, two hundred fifty-two".