2120081520 has 40 divisors (see below), whose sum is σ = 6572253456. Its totient is φ = 565355008.

The previous prime is 2120081497. The next prime is 2120081527. The reversal of 2120081520 is 251800212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120081527) by changing a digit.

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, 4416597 + ... + 4417076.

Almost surely, 2^2120081520 is an apocalyptic number.

2120081520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120081520 is an abundant number, since it is smaller than the sum of its proper divisors (4452171936).

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

2120081520 is a wasteful number, since it uses less digits than its factorization.

2120081520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8833689 (or 8833683 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 2120081520 is about 46044.3429750062. The cubic root of 2120081520 is about 1284.6481234091.

Adding to 2120081520 its reverse (251800212), we get a palindrome (2371881732).

The spelling of 2120081520 in words is "two billion, one hundred twenty million, eighty-one thousand, five hundred twenty".