2091193920 has 84 divisors (see below), whose sum is σ = 7192845660. Its totient is φ = 557650944.

The previous prime is 2091193901. The next prime is 2091193963. The reversal of 2091193920 is 293911902.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 676832256 + 1414361664 = 26016^2 + 37608^2 .

It is a super-2 number, since 2×2091193920² = 8746184022089932800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360175 + ... + 365934.

It is an arithmetic number, because the mean of its divisors is an integer number (85629115).

Almost surely, 2^2091193920 is an apocalyptic number.

2091193920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2091193920 is an abundant number, since it is smaller than the sum of its proper divisors (5101651740).

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

2091193920 is a wasteful number, since it uses less digits than its factorization.

2091193920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726132 (or 726119 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 2091193920 is about 45729.5738007692. The cubic root of 2091193920 is about 1278.7866757626.

The spelling of 2091193920 in words is "two billion, ninety-one million, one hundred ninety-three thousand, nine hundred twenty".