21464531343 has 24 divisors (see below), whose sum is σ = 31533428160. Its totient is φ = 14065796160.

The previous prime is 21464531303. The next prime is 21464531359. The reversal of 21464531343 is 34313546412.

21464531343 is a `hidden beast` number, since 2 + 1 + 4 + 645 + 3 + 1 + 3 + 4 + 3 = 666.

It is not a de Polignac number, because 21464531343 - 2⁸ = 21464531087 is a prime.

It is a super-2 number, since 2×21464531343² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21464531298 and 21464531307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21464531303) 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, 873418 + ... + 897656.

It is an arithmetic number, because the mean of its divisors is an integer number (1313892840).

Almost surely, 2^21464531343 is an apocalyptic number.

21464531343 is a deficient number, since it is larger than the sum of its proper divisors (10068896817).

21464531343 is a wasteful number, since it uses less digits than its factorization.

21464531343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25919 (or 25916 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The spelling of 21464531343 in words is "twenty-one billion, four hundred sixty-four million, five hundred thirty-one thousand, three hundred forty-three".