21214036545343 has 4 divisors (see below), whose sum is σ = 21707386232488. Its totient is φ = 20720686858200.

The previous prime is 21214036545319. The next prime is 21214036545347. The reversal of 21214036545343 is 34354563041212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21214036545343 - 2⁵ = 21214036545311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 493349687101 = 21214036545343 / (2 + 1 + 2 + 1 + 4 + 0 + 3 + 6 + 5 + 4 + 5 + 3 + 4 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21214036545343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214036545347) 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, 246674843508 + ... + 246674843593.

It is an arithmetic number, because the mean of its divisors is an integer number (5426846558122).

Almost surely, 2^{21214036545343} is an apocalyptic number.

21214036545343 is a deficient number, since it is larger than the sum of its proper divisors (493349687145).

21214036545343 is an equidigital number, since it uses as much as digits as its factorization.

21214036545343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493349687144.

The product of its (nonzero) digits is 1036800, while the sum is 43.

Adding to 21214036545343 its reverse (34354563041212), we get a palindrome (55568599586555).

The spelling of 21214036545343 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred forty-five thousand, three hundred forty-three".