21535044040235 has 16 divisors (see below), whose sum is σ = 28256437409760. Its totient is φ = 15625679639040.

The previous prime is 21535044040229. The next prime is 21535044040271. The reversal of 21535044040235 is 53204044053512.

It is not a de Polignac number, because 21535044040235 - 2²⁰ = 21535042991659 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452108120 + ... + 452155749.

It is an arithmetic number, because the mean of its divisors is an integer number (1766027338110).

Almost surely, 2^{21535044040235} is an apocalyptic number.

21535044040235 is a deficient number, since it is larger than the sum of its proper divisors (6721393369525).

21535044040235 is a wasteful number, since it uses less digits than its factorization.

21535044040235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904264318.

The product of its (nonzero) digits is 288000, while the sum is 38.

Adding to 21535044040235 its reverse (53204044053512), we get a palindrome (74739088093747).

The spelling of 21535044040235 in words is "twenty-one trillion, five hundred thirty-five billion, forty-four million, forty thousand, two hundred thirty-five".