21143143234 has 16 divisors (see below), whose sum is σ = 32202206208. Its totient is φ = 10409213232.

The previous prime is 21143143213. The next prime is 21143143267. The reversal of 21143143234 is 43234134112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282367 + ... + 349309.

It is an arithmetic number, because the mean of its divisors is an integer number (2012637888).

Almost surely, 2^21143143234 is an apocalyptic number.

21143143234 is a deficient number, since it is larger than the sum of its proper divisors (11059062974).

21143143234 is a wasteful number, since it uses less digits than its factorization.

21143143234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69369.

The product of its digits is 6912, while the sum is 28.

Adding to 21143143234 its reverse (43234134112), we get a palindrome (64377277346).

The spelling of 21143143234 in words is "twenty-one billion, one hundred forty-three million, one hundred forty-three thousand, two hundred thirty-four".