21443143113 has 24 divisors (see below), whose sum is σ = 35526024768. Its totient is φ = 12208979232.

The previous prime is 21443143109. The next prime is 21443143123. The reversal of 21443143113 is 31134134412.

21443143113 is a `hidden beast` number, since 214 + 4 + 3 + 1 + 431 + 13 = 666.

It is not a de Polignac number, because 21443143113 - 2² = 21443143109 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21443143123) 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 23 ways as a sum of consecutive naturals, for example, 596931 + ... + 631832.

It is an arithmetic number, because the mean of its divisors is an integer number (1480251032).

Almost surely, 2^21443143113 is an apocalyptic number.

It is an amenable number.

21443143113 is a deficient number, since it is larger than the sum of its proper divisors (14082881655).

21443143113 is a wasteful number, since it uses less digits than its factorization.

21443143113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229053 (or 1229050 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 21443143113 its reverse (31134134412), we get a palindrome (52577277525).

The spelling of 21443143113 in words is "twenty-one billion, four hundred forty-three million, one hundred forty-three thousand, one hundred thirteen".