189468642021 has 8 divisors (see below), whose sum is σ = 261336058080. Its totient is φ = 121956826992.

The previous prime is 189468642007. The next prime is 189468642023. The reversal of 189468642021 is 120246864981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189468642021 - 2¹³ = 189468633829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189468642023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088900155 + ... + 1088900328.

It is an arithmetic number, because the mean of its divisors is an integer number (32667007260).

Almost surely, 2^189468642021 is an apocalyptic number.

It is an amenable number.

189468642021 is a deficient number, since it is larger than the sum of its proper divisors (71867416059).

189468642021 is a wasteful number, since it uses less digits than its factorization.

189468642021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177800515.

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 189468642021 in words is "one hundred eighty-nine billion, four hundred sixty-eight million, six hundred forty-two thousand, twenty-one".