21234230044 has 6 divisors (see below), whose sum is σ = 37159902584. Its totient is φ = 10617115020.

The previous prime is 21234230023. The next prime is 21234230057. The reversal of 21234230044 is 44003243212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2654278752 + ... + 2654278759.

Almost surely, 2^21234230044 is an apocalyptic number.

It is an amenable number.

21234230044 is a deficient number, since it is larger than the sum of its proper divisors (15925672540).

21234230044 is a wasteful number, since it uses less digits than its factorization.

21234230044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308557515 (or 5308557513 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21234230044 its reverse (44003243212), we get a palindrome (65237473256).

The spelling of 21234230044 in words is "twenty-one billion, two hundred thirty-four million, two hundred thirty thousand, forty-four".