21532424335453 has 24 divisors (see below), whose sum is σ = 22952891969280. Its totient is φ = 20194320141600.

The previous prime is 21532424335439. The next prime is 21532424335463. The reversal of 21532424335453 is 35453342423512.

It is not a de Polignac number, because 21532424335453 - 2⁵ = 21532424335421 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 (21532424335463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3546828 + ... + 7459546.

It is an arithmetic number, because the mean of its divisors is an integer number (956370498720).

Almost surely, 2^{21532424335453} is an apocalyptic number.

21532424335453 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21532424335453 is a deficient number, since it is larger than the sum of its proper divisors (1420467633827).

21532424335453 is a wasteful number, since it uses less digits than its factorization.

21532424335453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912969 (or 3912946 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 46.

Adding to 21532424335453 its reverse (35453342423512), we get a palindrome (56985766758965).

The spelling of 21532424335453 in words is "twenty-one trillion, five hundred thirty-two billion, four hundred twenty-four million, three hundred thirty-five thousand, four hundred fifty-three".