189018911 has 4 divisors (see below), whose sum is σ = 189256872. Its totient is φ = 188780952.

The previous prime is 189018887. The next prime is 189018917. The reversal of 189018911 is 119810981.

189018911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 119810981 = 241 ⋅497141.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189018911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189018917) 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, 117785 + ... + 119378.

It is an arithmetic number, because the mean of its divisors is an integer number (47314218).

Almost surely, 2^189018911 is an apocalyptic number.

189018911 is a deficient number, since it is larger than the sum of its proper divisors (237961).

189018911 is an equidigital number, since it uses as much as digits as its factorization.

189018911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237960.

The product of its (nonzero) digits is 5184, while the sum is 38.

The square root of 189018911 is about 13748.4148540841. The cubic root of 189018911 is about 573.8984946387.

The spelling of 189018911 in words is "one hundred eighty-nine million, eighteen thousand, nine hundred eleven".