189418220 has 24 divisors (see below), whose sum is σ = 418714800. Its totient is φ = 71779392.

The previous prime is 189418213. The next prime is 189418241. The reversal of 189418220 is 22814981.

189418220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248855 + ... + 249614.

It is an arithmetic number, because the mean of its divisors is an integer number (17446450).

Almost surely, 2^189418220 is an apocalyptic number.

189418220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189418220 is an abundant number, since it is smaller than the sum of its proper divisors (229296580).

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

189418220 is a wasteful number, since it uses less digits than its factorization.

189418220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498497 (or 498495 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 189418220 is about 13762.9291940342. The cubic root of 189418220 is about 574.3023372144.

The spelling of 189418220 in words is "one hundred eighty-nine million, four hundred eighteen thousand, two hundred twenty".