21134140423 has 8 divisors (see below), whose sum is σ = 23057026560. Its totient is φ = 19211521080.

The previous prime is 21134140411. The next prime is 21134140483. The reversal of 21134140423 is 32404143112.

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

It is a cyclic number.

It is not a de Polignac number, because 21134140423 - 2⁹ = 21134139911 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 (21134140403) 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 7 ways as a sum of consecutive naturals, for example, 122218 + ... + 239176.

It is an arithmetic number, because the mean of its divisors is an integer number (2882128320).

Almost surely, 2^21134140423 is an apocalyptic number.

21134140423 is a deficient number, since it is larger than the sum of its proper divisors (1922886137).

21134140423 is a wasteful number, since it uses less digits than its factorization.

21134140423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133397.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21134140423 its reverse (32404143112), we get a palindrome (53538283535).

The spelling of 21134140423 in words is "twenty-one billion, one hundred thirty-four million, one hundred forty thousand, four hundred twenty-three".