2105257740 has 96 divisors (see below), whose sum is σ = 6107222016. Its totient is φ = 541297920.

The previous prime is 2105257729. The next prime is 2105257751. The reversal of 2105257740 is 477525012.

It is an interprime number because it is at equal distance from previous prime (2105257729) and next prime (2105257751).

It is a super-2 number, since 2×2105257740² = 8864220303659815200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 543049 + ... + 546911.

It is an arithmetic number, because the mean of its divisors is an integer number (63616896).

Almost surely, 2^2105257740 is an apocalyptic number.

2105257740 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 2105257740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3053611008).

2105257740 is an abundant number, since it is smaller than the sum of its proper divisors (4001964276).

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

2105257740 is a wasteful number, since it uses less digits than its factorization.

2105257740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4199 (or 4197 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 33.

The square root of 2105257740 is about 45883.0877339353. The cubic root of 2105257740 is about 1281.6469968980.

The spelling of 2105257740 in words is "two billion, one hundred five million, two hundred fifty-seven thousand, seven hundred forty".