21440013134 has 8 divisors (see below), whose sum is σ = 32186449008. Its totient is φ = 10711196800.

The previous prime is 21440013121. The next prime is 21440013157. The reversal of 21440013134 is 43131004412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4401842 + ... + 4406709.

It is an arithmetic number, because the mean of its divisors is an integer number (4023306126).

Almost surely, 2^21440013134 is an apocalyptic number.

21440013134 is a deficient number, since it is larger than the sum of its proper divisors (10746435874).

21440013134 is a wasteful number, since it uses less digits than its factorization.

21440013134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8809770.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21440013134 its reverse (43131004412), we get a palindrome (64571017546).

The spelling of 21440013134 in words is "twenty-one billion, four hundred forty million, thirteen thousand, one hundred thirty-four".