2123635613 has 4 divisors (see below), whose sum is σ = 2316693408. Its totient is φ = 1930577820.

The previous prime is 2123635603. The next prime is 2123635649. The reversal of 2123635613 is 3165363212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2123635613 - 2¹⁶ = 2123570077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123635613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123635603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96528881 + ... + 96528902.

It is an arithmetic number, because the mean of its divisors is an integer number (579173352).

Almost surely, 2^2123635613 is an apocalyptic number.

It is an amenable number.

2123635613 is a deficient number, since it is larger than the sum of its proper divisors (193057795).

2123635613 is a wasteful number, since it uses less digits than its factorization.

2123635613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193057794.

The product of its digits is 19440, while the sum is 32.

The square root of 2123635613 is about 46082.9210554192. The cubic root of 2123635613 is about 1285.3655816602.

Adding to 2123635613 its reverse (3165363212), we get a palindrome (5288998825).

It can be divided in two parts, 2123 and 635613, that added together give a palindrome (637736).

The spelling of 2123635613 in words is "two billion, one hundred twenty-three million, six hundred thirty-five thousand, six hundred thirteen".