21342000043 has 32 divisors (see below), whose sum is σ = 26583872000. Its totient is φ = 16682941440.

The previous prime is 21341999981. The next prime is 21342000077. The reversal of 21342000043 is 34000024312.

It is a cyclic number.

It is not a de Polignac number, because 21342000043 - 2¹⁷ = 21341868971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21342004043) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 6097708 + ... + 6101206.

It is an arithmetic number, because the mean of its divisors is an integer number (830746000).

Almost surely, 2^21342000043 is an apocalyptic number.

21342000043 is a deficient number, since it is larger than the sum of its proper divisors (5241871957).

21342000043 is a wasteful number, since it uses less digits than its factorization.

21342000043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4307.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21342000043 its reverse (34000024312), we get a palindrome (55342024355).

The spelling of 21342000043 in words is "twenty-one billion, three hundred forty-two million, forty-three", and thus it is an aban number.