21444032134 has 32 divisors (see below), whose sum is σ = 37932826176. Its totient is φ = 8900666880.

The previous prime is 21444031967. The next prime is 21444032143. The reversal of 21444032134 is 43123044412.

21444032134 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57709 + ... + 214984.

It is an arithmetic number, because the mean of its divisors is an integer number (1185400818).

Almost surely, 2^21444032134 is an apocalyptic number.

21444032134 is a deficient number, since it is larger than the sum of its proper divisors (16488794042).

21444032134 is a wasteful number, since it uses less digits than its factorization.

21444032134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272880.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21444032134 its reverse (43123044412), we get a palindrome (64567076546).

The spelling of 21444032134 in words is "twenty-one billion, four hundred forty-four million, thirty-two thousand, one hundred thirty-four".