1920191102 has 4 divisors (see below), whose sum is σ = 2880286656. Its totient is φ = 960095550.

The previous prime is 1920191083. The next prime is 1920191107. The reversal of 1920191102 is 2011910291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2011910291 = 1297 ⋅1551203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920191107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480047774 + ... + 480047777.

It is an arithmetic number, because the mean of its divisors is an integer number (720071664).

Almost surely, 2^1920191102 is an apocalyptic number.

1920191102 is a deficient number, since it is larger than the sum of its proper divisors (960095554).

1920191102 is an equidigital number, since it uses as much as digits as its factorization.

1920191102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960095553.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 1920191102 is about 43819.9851894087. The cubic root of 1920191102 is about 1242.9342370098.

The spelling of 1920191102 in words is "one billion, nine hundred twenty million, one hundred ninety-one thousand, one hundred two".