21034323044 has 12 divisors (see below), whose sum is σ = 42068646144. Its totient is φ = 9014709864.

The previous prime is 21034323043. The next prime is 21034323049. The reversal of 21034323044 is 44032343012.

21034323044 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21034323043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375612884 + ... + 375612939.

It is an arithmetic number, because the mean of its divisors is an integer number (3505720512).

Almost surely, 2^21034323044 is an apocalyptic number.

It is an amenable number.

21034323044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21034323044 is a wasteful number, since it uses less digits than its factorization.

21034323044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751225834 (or 751225832 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21034323044 its reverse (44032343012), we get a palindrome (65066666056).

The spelling of 21034323044 in words is "twenty-one billion, thirty-four million, three hundred twenty-three thousand, forty-four".