2120642844 has 24 divisors (see below), whose sum is σ = 4994414208. Its totient is φ = 700274160.

The previous prime is 2120642831. The next prime is 2120642861. The reversal of 2120642844 is 4482460212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824512 + ... + 827079.

It is an arithmetic number, because the mean of its divisors is an integer number (208100592).

Almost surely, 2^2120642844 is an apocalyptic number.

It is an amenable number.

2120642844 is an abundant number, since it is smaller than the sum of its proper divisors (2873771364).

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

2120642844 is a wasteful number, since it uses less digits than its factorization.

2120642844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651705 (or 1651703 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 2120642844 is about 46050.4380435192. The cubic root of 2120642844 is about 1284.7614901491.

The spelling of 2120642844 in words is "two billion, one hundred twenty million, six hundred forty-two thousand, eight hundred forty-four".