190920428209 has 32 divisors (see below), whose sum is σ = 231714846720. Its totient is φ = 153779252352.

The previous prime is 190920428207. The next prime is 190920428213. The reversal of 190920428209 is 902824029091.

It is a cyclic number.

It is not a de Polignac number, because 190920428209 - 2¹ = 190920428207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190920428207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2352069 + ... + 2431885.

It is an arithmetic number, because the mean of its divisors is an integer number (7241088960).

Almost surely, 2^190920428209 is an apocalyptic number.

It is an amenable number.

190920428209 is a deficient number, since it is larger than the sum of its proper divisors (40794418511).

190920428209 is a wasteful number, since it uses less digits than its factorization.

190920428209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80109.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 190920428209 in words is "one hundred ninety billion, nine hundred twenty million, four hundred twenty-eight thousand, two hundred nine".