21134001044 has 24 divisors (see below), whose sum is σ = 42172374888. Its totient is φ = 9180380160.

The previous prime is 21134001023. The next prime is 21134001089. The reversal of 21134001044 is 44010043112.

It can be written as a sum of positive squares in 4 ways, for example, as 5323453444 + 15810547600 = 72962^2 + 125740^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11952737 + ... + 11954504.

It is an arithmetic number, because the mean of its divisors is an integer number (1757182287).

Almost surely, 2^21134001044 is an apocalyptic number.

It is an amenable number.

21134001044 is a deficient number, since it is larger than the sum of its proper divisors (21038373844).

21134001044 is a wasteful number, since it uses less digits than its factorization.

21134001044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23907275 (or 23907273 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21134001044 its reverse (44010043112), we get a palindrome (65144044156).

The spelling of 21134001044 in words is "twenty-one billion, one hundred thirty-four million, one thousand, forty-four".