21243234032 has 20 divisors (see below), whose sum is σ = 41162287320. Its totient is φ = 10620708288.

The previous prime is 21243234013. The next prime is 21243234037. The reversal of 21243234032 is 23043234212.

It is a junction number, because it is equal to n+sod(n) for n = 21243233992 and 21243234010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21243234037) 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, 161483 + ... + 261845.

It is an arithmetic number, because the mean of its divisors is an integer number (2058114366).

Almost surely, 2^21243234032 is an apocalyptic number.

It is an amenable number.

21243234032 is a deficient number, since it is larger than the sum of its proper divisors (19919053288).

21243234032 is a wasteful number, since it uses less digits than its factorization.

21243234032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113600 (or 113594 counting only the distinct ones).

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

Adding to 21243234032 its reverse (23043234212), we get a palindrome (44286468244).

The spelling of 21243234032 in words is "twenty-one billion, two hundred forty-three million, two hundred thirty-four thousand, thirty-two".