21140343023 has 2 divisors, whose sum is σ = 21140343024. Its totient is φ = 21140343022.

The previous prime is 21140342929. The next prime is 21140343109. The reversal of 21140343023 is 32034304112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21140343023 - 2⁸ = 21140342767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21140343023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21140343923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570171511 + 10570171512.

It is an arithmetic number, because the mean of its divisors is an integer number (10570171512).

Almost surely, 2^21140343023 is an apocalyptic number.

21140343023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140343023 is an equidigital number, since it uses as much as digits as its factorization.

21140343023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21140343023 its reverse (32034304112), we get a palindrome (53174647135).

The spelling of 21140343023 in words is "twenty-one billion, one hundred forty million, three hundred forty-three thousand, twenty-three".