2101957986 has 8 divisors (see below), whose sum is σ = 4203915984. Its totient is φ = 700652660.

The previous prime is 2101957939. The next prime is 2101957987. The reversal of 2101957986 is 6897591012.

It is a sphenic number, since it is the product of 3 distinct primes.

2101957986 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2101957987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175163160 + ... + 175163171.

It is an arithmetic number, because the mean of its divisors is an integer number (525489498).

Almost surely, 2^2101957986 is an apocalyptic number.

2101957986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2101957986 is a wasteful number, since it uses less digits than its factorization.

2101957986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350326336.

The product of its (nonzero) digits is 272160, while the sum is 48.

The square root of 2101957986 is about 45847.1153509138. The cubic root of 2101957986 is about 1280.9770343868.

The spelling of 2101957986 in words is "two billion, one hundred one million, nine hundred fifty-seven thousand, nine hundred eighty-six".