18890252 has 12 divisors (see below), whose sum is σ = 34198080. Its totient is φ = 9119376.

The previous prime is 18890203. The next prime is 18890257. The reversal of 18890252 is 25209881.

It is not an unprimeable number, because it can be changed into a prime (18890257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81308 + ... + 81539.

It is an arithmetic number, because the mean of its divisors is an integer number (2849840).

Almost surely, 2^18890252 is an apocalyptic number.

It is an amenable number.

18890252 is a deficient number, since it is larger than the sum of its proper divisors (15307828).

18890252 is a wasteful number, since it uses less digits than its factorization.

18890252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162880 (or 162878 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 18890252 is about 4346.2917527474. The cubic root of 18890252 is about 266.3253974716.

The spelling of 18890252 in words is "eighteen million, eight hundred ninety thousand, two hundred fifty-two".