21034143134 has 4 divisors (see below), whose sum is σ = 31551214704. Its totient is φ = 10517071566.

The previous prime is 21034143107. The next prime is 21034143187. The reversal of 21034143134 is 43134143012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258535782 + ... + 5258535785.

It is an arithmetic number, because the mean of its divisors is an integer number (7887803676).

Almost surely, 2^21034143134 is an apocalyptic number.

21034143134 is a deficient number, since it is larger than the sum of its proper divisors (10517071570).

21034143134 is a wasteful number, since it uses less digits than its factorization.

21034143134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10517071569.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21034143134 its reverse (43134143012), we get a palindrome (64168286146).

The spelling of 21034143134 in words is "twenty-one billion, thirty-four million, one hundred forty-three thousand, one hundred thirty-four".