20143234033421 has 16 divisors (see below), whose sum is σ = 21911484773376. Its totient is φ = 18440124155136.

The previous prime is 20143234033367. The next prime is 20143234033441. The reversal of 20143234033421 is 12433043234102.

It is a cyclic number.

It is not a de Polignac number, because 20143234033421 - 2¹⁸ = 20143233771277 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 (20143234033441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3063881 + ... + 7047966.

It is an arithmetic number, because the mean of its divisors is an integer number (1369467798336).

Almost surely, 2^{20143234033421} is an apocalyptic number.

It is an amenable number.

20143234033421 is a deficient number, since it is larger than the sum of its proper divisors (1768250739955).

20143234033421 is a wasteful number, since it uses less digits than its factorization.

20143234033421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10115068.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 20143234033421 its reverse (12433043234102), we get a palindrome (32576277267523).

The spelling of 20143234033421 in words is "twenty trillion, one hundred forty-three billion, two hundred thirty-four million, thirty-three thousand, four hundred twenty-one".