189455018 has 8 divisors (see below), whose sum is σ = 288999360. Its totient is φ = 93121900.

The previous prime is 189455017. The next prime is 189455039. The reversal of 189455018 is 810554981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (189455011) 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, 802658 + ... + 802893.

It is an arithmetic number, because the mean of its divisors is an integer number (36124920).

Almost surely, 2^189455018 is an apocalyptic number.

189455018 is a deficient number, since it is larger than the sum of its proper divisors (99544342).

189455018 is a wasteful number, since it uses less digits than its factorization.

189455018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605612.

The product of its (nonzero) digits is 57600, while the sum is 41.

The square root of 189455018 is about 13764.2659811557. The cubic root of 189455018 is about 574.3395244309.

The spelling of 189455018 in words is "one hundred eighty-nine million, four hundred fifty-five thousand, eighteen".