185220342008 has 16 divisors (see below), whose sum is σ = 374002613880. Its totient is φ = 85486311648.

The previous prime is 185220342001. The next prime is 185220342011. The reversal of 185220342008 is 800243022581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185220342001) 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, 890482310 + ... + 890482517.

Almost surely, 2^185220342008 is an apocalyptic number.

It is an amenable number.

185220342008 is an abundant number, since it is smaller than the sum of its proper divisors (188782271872).

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

185220342008 is a wasteful number, since it uses less digits than its factorization.

185220342008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780964846 (or 1780964842 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

Adding to 185220342008 its reverse (800243022581), we get a palindrome (985463364589).

The spelling of 185220342008 in words is "one hundred eighty-five billion, two hundred twenty million, three hundred forty-two thousand, eight".