189820081969 has 8 divisors (see below), whose sum is σ = 216950917248. Its totient is φ = 162692666880.

The previous prime is 189820081949. The next prime is 189820081991. The reversal of 189820081969 is 969180028981.

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

It is a cyclic number.

It is not a de Polignac number, because 189820081969 - 2¹¹ = 189820079921 is a prime.

It is a super-2 number, since 2×189820081969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189820081949) 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, 734992 + ... + 959089.

It is an arithmetic number, because the mean of its divisors is an integer number (27118864656).

Almost surely, 2^189820081969 is an apocalyptic number.

It is an amenable number.

189820081969 is a deficient number, since it is larger than the sum of its proper divisors (27130835279).

189820081969 is a wasteful number, since it uses less digits than its factorization.

189820081969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710095.

The product of its (nonzero) digits is 4478976, while the sum is 61.

The spelling of 189820081969 in words is "one hundred eighty-nine billion, eight hundred twenty million, eighty-one thousand, nine hundred sixty-nine".