21200140343 has 8 divisors (see below), whose sum is σ = 22524884640. Its totient is φ = 19953068640.

The previous prime is 21200140331. The next prime is 21200140373. The reversal of 21200140343 is 34304100212.

It is not a de Polignac number, because 21200140343 - 2⁴ = 21200140327 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 (21200140303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2152643 + ... + 2162468.

It is an arithmetic number, because the mean of its divisors is an integer number (2815610580).

Almost surely, 2^21200140343 is an apocalyptic number.

21200140343 is a deficient number, since it is larger than the sum of its proper divisors (1324744297).

21200140343 is an frugal number, since it uses more digits than its factorization.

21200140343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315162 (or 4315128 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21200140343 its reverse (34304100212), we get a palindrome (55504240555).

The spelling of 21200140343 in words is "twenty-one billion, two hundred million, one hundred forty thousand, three hundred forty-three".