21532034253 has 32 divisors (see below), whose sum is σ = 29150928000. Its totient is φ = 14136249600.

The previous prime is 21532034239. The next prime is 21532034261. The reversal of 21532034253 is 35243023512.

It is not a de Polignac number, because 21532034253 - 2⁸ = 21532033997 is a prime.

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 21532034253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21532034273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39800163 + ... + 39800703.

It is an arithmetic number, because the mean of its divisors is an integer number (910966500).

Almost surely, 2^21532034253 is an apocalyptic number.

It is an amenable number.

21532034253 is a deficient number, since it is larger than the sum of its proper divisors (7618893747).

21532034253 is a wasteful number, since it uses less digits than its factorization.

21532034253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293.

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 21532034253 its reverse (35243023512), we get a palindrome (56775057765).

The spelling of 21532034253 in words is "twenty-one billion, five hundred thirty-two million, thirty-four thousand, two hundred fifty-three".