21132441343 has 4 divisors (see below), whose sum is σ = 22758013768. Its totient is φ = 19506868920.

The previous prime is 21132441313. The next prime is 21132441347. The reversal of 21132441343 is 34314423112.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21132441343 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 (21132441347) 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, 812786193 + ... + 812786218.

It is an arithmetic number, because the mean of its divisors is an integer number (5689503442).

Almost surely, 2^21132441343 is an apocalyptic number.

21132441343 is a deficient number, since it is larger than the sum of its proper divisors (1625572425).

21132441343 is a wasteful number, since it uses less digits than its factorization.

21132441343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625572424.

The product of its digits is 6912, while the sum is 28.

Adding to 21132441343 its reverse (34314423112), we get a palindrome (55446864455).

The spelling of 21132441343 in words is "twenty-one billion, one hundred thirty-two million, four hundred forty-one thousand, three hundred forty-three".