21434233444412 has 24 divisors (see below), whose sum is σ = 39727228630320. Its totient is φ = 10083941292800.

The previous prime is 21434233444369. The next prime is 21434233444423. The reversal of 21434233444412 is 21444433243412.

It is a self number, because there is not a number n which added to its sum of digits gives 21434233444412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42824339 + ... + 43321962.

It is an arithmetic number, because the mean of its divisors is an integer number (1655301192930).

Almost surely, 2^{21434233444412} is an apocalyptic number.

It is an amenable number.

21434233444412 is a deficient number, since it is larger than the sum of its proper divisors (18292995185908).

21434233444412 is a wasteful number, since it uses less digits than its factorization.

21434233444412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86149981 (or 86149979 counting only the distinct ones).

The product of its digits is 884736, while the sum is 41.

Adding to 21434233444412 its reverse (21444433243412), we get a palindrome (42878666687824).

The spelling of 21434233444412 in words is "twenty-one trillion, four hundred thirty-four billion, two hundred thirty-three million, four hundred forty-four thousand, four hundred twelve".