21753030135 has 16 divisors (see below), whose sum is σ = 34807559040. Its totient is φ = 11600712480.

The previous prime is 21753030133. The next prime is 21753030149. The reversal of 21753030135 is 53103035712.

It is not a de Polignac number, because 21753030135 - 2¹ = 21753030133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21753030133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172476 + ... + 270654.

It is an arithmetic number, because the mean of its divisors is an integer number (2175472440).

Almost surely, 2^21753030135 is an apocalyptic number.

21753030135 is a deficient number, since it is larger than the sum of its proper divisors (13054528905).

21753030135 is a wasteful number, since it uses less digits than its factorization.

21753030135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112958.

The product of its (nonzero) digits is 9450, while the sum is 30.

Adding to 21753030135 its reverse (53103035712), we get a palindrome (74856065847).

The spelling of 21753030135 in words is "twenty-one billion, seven hundred fifty-three million, thirty thousand, one hundred thirty-five".