2120635505 has 16 divisors (see below), whose sum is σ = 2836270080. Its totient is φ = 1512675072.

The previous prime is 2120635483. The next prime is 2120635511. The reversal of 2120635505 is 5055360212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2120635505 - 2⁸ = 2120635249 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 654929 + ... + 658158.

It is an arithmetic number, because the mean of its divisors is an integer number (177266880).

Almost surely, 2^2120635505 is an apocalyptic number.

It is an amenable number.

2120635505 is a deficient number, since it is larger than the sum of its proper divisors (715634575).

2120635505 is a wasteful number, since it uses less digits than its factorization.

2120635505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313128.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 2120635505 is about 46050.3583590834. The cubic root of 2120635505 is about 1284.7600080709.

Adding to 2120635505 its reverse (5055360212), we get a palindrome (7175995717).

The spelling of 2120635505 in words is "two billion, one hundred twenty million, six hundred thirty-five thousand, five hundred five".