189342180906 has 8 divisors (see below), whose sum is σ = 378684361824. Its totient is φ = 63114060300.

The previous prime is 189342180889. The next prime is 189342180931. The reversal of 189342180906 is 609081243981.

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

189342180906 is an admirable number.

It is a super-2 number, since 2×189342180906² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15778515070 + ... + 15778515081.

It is an arithmetic number, because the mean of its divisors is an integer number (47335545228).

Almost surely, 2^189342180906 is an apocalyptic number.

189342180906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189342180906 is a wasteful number, since it uses less digits than its factorization.

189342180906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31557030156.

The product of its (nonzero) digits is 746496, while the sum is 51.

The spelling of 189342180906 in words is "one hundred eighty-nine billion, three hundred forty-two million, one hundred eighty thousand, nine hundred six".