21434233312 has 12 divisors (see below), whose sum is σ = 42198646896. Its totient is φ = 10717116640.

The previous prime is 21434233283. The next prime is 21434233321. The reversal of 21434233312 is 21333243412.

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, 334909864 + ... + 334909927.

It is an arithmetic number, because the mean of its divisors is an integer number (3516553908).

Almost surely, 2^21434233312 is an apocalyptic number.

It is an amenable number.

21434233312 is a deficient number, since it is larger than the sum of its proper divisors (20764413584).

21434233312 is an equidigital number, since it uses as much as digits as its factorization.

21434233312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669819801 (or 669819793 counting only the distinct ones).

The product of its digits is 10368, while the sum is 28.

Adding to 21434233312 its reverse (21333243412), we get a palindrome (42767476724).

The spelling of 21434233312 in words is "twenty-one billion, four hundred thirty-four million, two hundred thirty-three thousand, three hundred twelve".