21030134044 has 24 divisors (see below), whose sum is σ = 38593341360. Its totient is φ = 10013399424.

The previous prime is 21030134039. The next prime is 21030134093. The reversal of 21030134044 is 44043103012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1233274 + ... + 1250209.

It is an arithmetic number, because the mean of its divisors is an integer number (1608055890).

Almost surely, 2^21030134044 is an apocalyptic number.

It is an amenable number.

21030134044 is a deficient number, since it is larger than the sum of its proper divisors (17563207316).

21030134044 is a wasteful number, since it uses less digits than its factorization.

21030134044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483589 (or 2483587 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21030134044 its reverse (44043103012), we get a palindrome (65073237056).

The spelling of 21030134044 in words is "twenty-one billion, thirty million, one hundred thirty-four thousand, forty-four".