1091820019092 has 48 divisors (see below), whose sum is σ = 2782421433792. Its totient is φ = 330468455680.

The previous prime is 1091820019091. The next prime is 1091820019111. The reversal of 1091820019092 is 2909100281901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091820019091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4712643 + ... + 4938890.

It is an arithmetic number, because the mean of its divisors is an integer number (57967113204).

Almost surely, 2^{1091820019092} is an apocalyptic number.

1091820019092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1091820019092 is an abundant number, since it is smaller than the sum of its proper divisors (1690601414700).

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

1091820019092 is a wasteful number, since it uses less digits than its factorization.

1091820019092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9652408 (or 9652406 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 42.

The spelling of 1091820019092 in words is "one trillion, ninety-one billion, eight hundred twenty million, nineteen thousand, ninety-two".