2120868747 has 18 divisors (see below), whose sum is σ = 3136060356. Its totient is φ = 1380440880.

The previous prime is 2120868733. The next prime is 2120868769. The reversal of 2120868747 is 7478680212.

It is not a de Polignac number, because 2120868747 - 2⁴ = 2120868731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2120868047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 904797 + ... + 907137.

Almost surely, 2^2120868747 is an apocalyptic number.

2120868747 is a deficient number, since it is larger than the sum of its proper divisors (1015191609).

2120868747 is an frugal number, since it uses more digits than its factorization.

2120868747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4731 (or 2387 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 2120868747 is about 46052.8907561730. The cubic root of 2120868747 is about 1284.8071085757.

The spelling of 2120868747 in words is "two billion, one hundred twenty million, eight hundred sixty-eight thousand, seven hundred forty-seven".