21535260453 has 24 divisors (see below), whose sum is σ = 36866950848. Its totient is φ = 12305862144.

The previous prime is 21535260443. The next prime is 21535260463. The reversal of 21535260453 is 35406253512.

21535260453 is a `hidden beast` number, since 2 + 15 + 35 + 2 + 604 + 5 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (21535260443) and next prime (21535260463).

It is not a de Polignac number, because 21535260453 - 2¹⁰ = 21535259429 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21535260403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6328476 + ... + 6331877.

It is an arithmetic number, because the mean of its divisors is an integer number (1536122952).

Almost surely, 2^21535260453 is an apocalyptic number.

It is an amenable number.

21535260453 is a deficient number, since it is larger than the sum of its proper divisors (15331690395).

21535260453 is an equidigital number, since it uses as much as digits as its factorization.

21535260453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12660375 (or 12660363 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 21535260453 in words is "twenty-one billion, five hundred thirty-five million, two hundred sixty thousand, four hundred fifty-three".