189314428018321 has 4 divisors (see below), whose sum is σ = 189314495219200. Its totient is φ = 189314360817444.

The previous prime is 189314428018277. The next prime is 189314428018343. The reversal of 189314428018321 is 123810824413981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189314428018321 - 2³⁷ = 189176989064849 is a prime.

It is a super-2 number, since 2×189314428018321² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189314428018361) 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, 29180961 + ... + 35073598.

It is an arithmetic number, because the mean of its divisors is an integer number (47328623804800).

Almost surely, 2^{189314428018321} is an apocalyptic number.

It is an amenable number.

189314428018321 is a deficient number, since it is larger than the sum of its proper divisors (67200879).

189314428018321 is an equidigital number, since it uses as much as digits as its factorization.

189314428018321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67200878.

The product of its (nonzero) digits is 2654208, while the sum is 55.

The spelling of 189314428018321 in words is "one hundred eighty-nine trillion, three hundred fourteen billion, four hundred twenty-eight million, eighteen thousand, three hundred twenty-one".