21652452453 has 4 divisors (see below), whose sum is σ = 28869936608. Its totient is φ = 14434968300.

The previous prime is 21652452433. The next prime is 21652452527. The reversal of 21652452453 is 35425425612.

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 not a de Polignac number, because 21652452453 - 2⁶ = 21652452389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21652452403) 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, 3608742073 + ... + 3608742078.

It is an arithmetic number, because the mean of its divisors is an integer number (7217484152).

Almost surely, 2^21652452453 is an apocalyptic number.

It is an amenable number.

21652452453 is a deficient number, since it is larger than the sum of its proper divisors (7217484155).

21652452453 is an equidigital number, since it uses as much as digits as its factorization.

21652452453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7217484154.

The product of its digits is 288000, while the sum is 39.

The spelling of 21652452453 in words is "twenty-one billion, six hundred fifty-two million, four hundred fifty-two thousand, four hundred fifty-three".