21143332434434 has 32 divisors (see below), whose sum is σ = 36553799197440. Its totient is φ = 8984564252928.

The previous prime is 21143332434431. The next prime is 21143332434473. The reversal of 21143332434434 is 43443423334112.

It is a junction number, because it is equal to n+sod(n) for n = 21143332434391 and 21143332434400.

It is not an unprimeable number, because it can be changed into a prime (21143332434431) 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 15 ways as a sum of consecutive naturals, for example, 4960307 + ... + 8178710.

It is an arithmetic number, because the mean of its divisors is an integer number (1142306224920).

Almost surely, 2^{21143332434434} is an apocalyptic number.

21143332434434 is a deficient number, since it is larger than the sum of its proper divisors (15410466763006).

21143332434434 is a wasteful number, since it uses less digits than its factorization.

21143332434434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13140002.

The product of its digits is 995328, while the sum is 41.

Adding to 21143332434434 its reverse (43443423334112), we get a palindrome (64586755768546).

The spelling of 21143332434434 in words is "twenty-one trillion, one hundred forty-three billion, three hundred thirty-two million, four hundred thirty-four thousand, four hundred thirty-four".