21023234004 has 48 divisors (see below), whose sum is σ = 50269925888. Its totient is φ = 6836103648.

The previous prime is 21023234003. The next prime is 21023234021. The reversal of 21023234004 is 40043232012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023234003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44122 + ... + 209745.

Almost surely, 2^21023234004 is an apocalyptic number.

It is an amenable number.

21023234004 is an abundant number, since it is smaller than the sum of its proper divisors (29246691884).

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

21023234004 is a wasteful number, since it uses less digits than its factorization.

21023234004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254044 (or 254042 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21023234004 its reverse (40043232012), we get a palindrome (61066466016).

The spelling of 21023234004 in words is "twenty-one billion, twenty-three million, two hundred thirty-four thousand, four".