21314406143 has 2 divisors, whose sum is σ = 21314406144. Its totient is φ = 21314406142.

The previous prime is 21314406137. The next prime is 21314406151. The reversal of 21314406143 is 34160441312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21314406143 is a prime.

It is a super-2 number, since 2×21314406143² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21314406163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10657203071 + 10657203072.

It is an arithmetic number, because the mean of its divisors is an integer number (10657203072).

Almost surely, 2^21314406143 is an apocalyptic number.

21314406143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21314406143 is an equidigital number, since it uses as much as digits as its factorization.

21314406143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21314406143 its reverse (34160441312), we get a palindrome (55474847455).

The spelling of 21314406143 in words is "twenty-one billion, three hundred fourteen million, four hundred six thousand, one hundred forty-three".