189321605823 has 16 divisors (see below), whose sum is σ = 288553051136. Its totient is φ = 108160155360.

The previous prime is 189321605813. The next prime is 189321605839. The reversal of 189321605823 is 328506123981.

It is not a de Polignac number, because 189321605823 - 2⁸ = 189321605567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189321605813) 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, 885436 + ... + 1078257.

It is an arithmetic number, because the mean of its divisors is an integer number (18034565696).

Almost surely, 2^189321605823 is an apocalyptic number.

189321605823 is a deficient number, since it is larger than the sum of its proper divisors (99231445313).

189321605823 is a wasteful number, since it uses less digits than its factorization.

189321605823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968294.

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 189321605823 in words is "one hundred eighty-nine billion, three hundred twenty-one million, six hundred five thousand, eight hundred twenty-three".