920020200191 has 4 divisors (see below), whose sum is σ = 920257261584. Its totient is φ = 919783138800.

The previous prime is 920020200161. The next prime is 920020200247. The reversal of 920020200191 is 191002020029.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191002020029 = 42751 ⋅4467779.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920020200191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 920020200191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920020200161) 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, 118524875 + ... + 118532636.

It is an arithmetic number, because the mean of its divisors is an integer number (230064315396).

Almost surely, 2^920020200191 is an apocalyptic number.

920020200191 is a deficient number, since it is larger than the sum of its proper divisors (237061393).

920020200191 is a wasteful number, since it uses less digits than its factorization.

920020200191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237061392.

The product of its (nonzero) digits is 648, while the sum is 26.

It can be divided in two parts, 920020 and 200191, that added together give a palindrome (1120211).

The spelling of 920020200191 in words is "nine hundred twenty billion, twenty million, two hundred thousand, one hundred ninety-one".