189182374021 has 4 divisors (see below), whose sum is σ = 189412804044. Its totient is φ = 188951944000.

The previous prime is 189182373977. The next prime is 189182374027. The reversal of 189182374021 is 120473281981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31502700100 + 157679673921 = 177490^2 + 397089^2 .

It is a cyclic number.

It is not a de Polignac number, because 189182374021 - 2²¹ = 189180276869 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 (189182374027) 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, 115213780 + ... + 115215421.

It is an arithmetic number, because the mean of its divisors is an integer number (47353201011).

Almost surely, 2^189182374021 is an apocalyptic number.

It is an amenable number.

189182374021 is a deficient number, since it is larger than the sum of its proper divisors (230430023).

189182374021 is an equidigital number, since it uses as much as digits as its factorization.

189182374021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230430022.

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 189182374021 in words is "one hundred eighty-nine billion, one hundred eighty-two million, three hundred seventy-four thousand, twenty-one".