21231302434 has 8 divisors (see below), whose sum is σ = 31869089280. Its totient is φ = 10608272676.

The previous prime is 21231302401. The next prime is 21231302447. The reversal of 21231302434 is 43420313212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21231302399 and 21231302408.

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, 3685674 + ... + 3691429.

It is an arithmetic number, because the mean of its divisors is an integer number (3983636160).

Almost surely, 2^21231302434 is an apocalyptic number.

21231302434 is a deficient number, since it is larger than the sum of its proper divisors (10637786846).

21231302434 is a wasteful number, since it uses less digits than its factorization.

21231302434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7378544.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21231302434 its reverse (43420313212), we get a palindrome (64651615646).

The spelling of 21231302434 in words is "twenty-one billion, two hundred thirty-one million, three hundred two thousand, four hundred thirty-four".