2120837885 has 8 divisors (see below), whose sum is σ = 2546347320. Its totient is φ = 1695775744.

The previous prime is 2120837881. The next prime is 2120837903. The reversal of 2120837885 is 5887380212.

It can be written as a sum of positive squares in 4 ways, for example, as 696379321 + 1424458564 = 26389^2 + 37742^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2120837885 - 2² = 2120837881 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120837881) 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, 101300 + ... + 120429.

It is an arithmetic number, because the mean of its divisors is an integer number (318293415).

Almost surely, 2^2120837885 is an apocalyptic number.

It is an amenable number.

2120837885 is a deficient number, since it is larger than the sum of its proper divisors (425509435).

2120837885 is a wasteful number, since it uses less digits than its factorization.

2120837885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223647.

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 2120837885 is about 46052.5556836969. Note that the first 3 decimals coincide. The cubic root of 2120837885 is about 1284.8008765526.

The spelling of 2120837885 in words is "two billion, one hundred twenty million, eight hundred thirty-seven thousand, eight hundred eighty-five".