2105988864 has 72 divisors (see below), whose sum is σ = 6405732480. Its totient is φ = 601709568.

The previous prime is 2105988839. The next prime is 2105988869. The reversal of 2105988864 is 4688895012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105988869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190494 + ... + 201245.

Almost surely, 2^2105988864 is an apocalyptic number.

2105988864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2105988864 is an abundant number, since it is smaller than the sum of its proper divisors (4299743616).

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

2105988864 is an equidigital number, since it uses as much as digits as its factorization.

2105988864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391765 (or 391751 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The square root of 2105988864 is about 45891.0542916591. The cubic root of 2105988864 is about 1281.7953452306.

The spelling of 2105988864 in words is "two billion, one hundred five million, nine hundred eighty-eight thousand, eight hundred sixty-four".