21343443410 has 8 divisors (see below), whose sum is σ = 38418198156. Its totient is φ = 8537377360.

The previous prime is 21343443383. The next prime is 21343443427. The reversal of 21343443410 is 1434434312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21340242889 + 3200521 = 146083^2 + 1789^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067172161 + ... + 1067172180.

Almost surely, 2^21343443410 is an apocalyptic number.

21343443410 is a deficient number, since it is larger than the sum of its proper divisors (17074754746).

21343443410 is a wasteful number, since it uses less digits than its factorization.

21343443410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134344348.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 21343443410 its reverse (1434434312), we get a palindrome (22777877722).

The spelling of 21343443410 in words is "twenty-one billion, three hundred forty-three million, four hundred forty-three thousand, four hundred ten".