21355462305543 has 8 divisors (see below), whose sum is σ = 28874991286656. Its totient is φ = 14036454097400.

The previous prime is 21355462305539. The next prime is 21355462305571. The reversal of 21355462305543 is 34550326455312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21355462305543 - 2² = 21355462305539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21355462305492 and 21355462305501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21355462305523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50130192993 + ... + 50130193418.

It is an arithmetic number, because the mean of its divisors is an integer number (3609373910832).

Almost surely, 2^{21355462305543} is an apocalyptic number.

21355462305543 is a deficient number, since it is larger than the sum of its proper divisors (7519528981113).

21355462305543 is a wasteful number, since it uses less digits than its factorization.

21355462305543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100260386485.

The product of its (nonzero) digits is 6480000, while the sum is 48.

The spelling of 21355462305543 in words is "twenty-one trillion, three hundred fifty-five billion, four hundred sixty-two million, three hundred five thousand, five hundred forty-three".