21432223234 has 8 divisors (see below), whose sum is σ = 32148959040. Its totient is φ = 10715903556.

The previous prime is 21432223223. The next prime is 21432223259. The reversal of 21432223234 is 43232223412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130267 + ... + 244609.

It is an arithmetic number, because the mean of its divisors is an integer number (4018619880).

Almost surely, 2^21432223234 is an apocalyptic number.

21432223234 is a deficient number, since it is larger than the sum of its proper divisors (10716735806).

21432223234 is a wasteful number, since it uses less digits than its factorization.

21432223234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208064.

The product of its digits is 13824, while the sum is 28.

Adding to 21432223234 its reverse (43232223412), we get a palindrome (64664446646).

The spelling of 21432223234 in words is "twenty-one billion, four hundred thirty-two million, two hundred twenty-three thousand, two hundred thirty-four".