2105797920 has 192 divisors, whose sum is σ = 6762921984. Its totient is φ = 550702080.

The previous prime is 2105797907. The next prime is 2105797921. The reversal of 2105797920 is 297975012.

It is not an unprimeable number, because it can be changed into a prime (2105797921) 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, 9442929 + ... + 9443151.

It is an arithmetic number, because the mean of its divisors is an integer number (35223552).

Almost surely, 2^2105797920 is an apocalyptic number.

2105797920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2105797920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3381460992).

2105797920 is an abundant number, since it is smaller than the sum of its proper divisors (4657124064).

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

2105797920 is a wasteful number, since it uses less digits than its factorization.

2105797920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 2105797920 is about 45888.9738390389. The cubic root of 2105797920 is about 1281.7566051512.

The spelling of 2105797920 in words is "two billion, one hundred five million, seven hundred ninety-seven thousand, nine hundred twenty".