2105649934720 has 32 divisors (see below), whose sum is σ = 5033819376720. Its totient is φ = 842259973632.

The previous prime is 2105649934709. The next prime is 2105649934723. The reversal of 2105649934720 is 274399465012.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×2105649934720² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105649934723) 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, 1645038372 + ... + 1645039651.

Almost surely, 2^{2105649934720} is an apocalyptic number.

2105649934720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105649934720 is an abundant number, since it is smaller than the sum of its proper divisors (2928169442000).

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

2105649934720 is an equidigital number, since it uses as much as digits as its factorization.

2105649934720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290078042 (or 3290078030 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 2105649934720 in words is "two trillion, one hundred five billion, six hundred forty-nine million, nine hundred thirty-four thousand, seven hundred twenty".