189549018 has 32 divisors (see below), whose sum is σ = 424267200. Its totient is φ = 62725968.

The previous prime is 189549013. The next prime is 189549043. The reversal of 189549018 is 810945981.

189549018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189549013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5121 + ... + 20132.

It is an arithmetic number, because the mean of its divisors is an integer number (13258350).

Almost surely, 2^189549018 is an apocalyptic number.

189549018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

189549018 is an abundant number, since it is smaller than the sum of its proper divisors (234718182).

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

189549018 is a wasteful number, since it uses less digits than its factorization.

189549018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25403 (or 25397 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 189549018 is about 13767.6801967506. The cubic root of 189549018 is about 574.4344968232.

It can be divided in two parts, 18954 and 9018, that added together give a palindrome (27972).

The spelling of 189549018 in words is "one hundred eighty-nine million, five hundred forty-nine thousand, eighteen".