21343707143 has 32 divisors (see below), whose sum is σ = 24146337600. Its totient is φ = 18697651200.

The previous prime is 21343707139. The next prime is 21343707167. The reversal of 21343707143 is 34170734312.

It is a cyclic number.

It is not a de Polignac number, because 21343707143 - 2² = 21343707139 is a prime.

It is a super-2 number, since 2×21343707143² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343707443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25021505 + ... + 25022357.

It is an arithmetic number, because the mean of its divisors is an integer number (754573050).

Almost surely, 2^21343707143 is an apocalyptic number.

21343707143 is a deficient number, since it is larger than the sum of its proper divisors (2802630457).

21343707143 is a wasteful number, since it uses less digits than its factorization.

21343707143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523.

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 21343707143 in words is "twenty-one billion, three hundred forty-three million, seven hundred seven thousand, one hundred forty-three".