21434434201444 has 24 divisors (see below), whose sum is σ = 41918339173536. Its totient is φ = 9505292328000.

The previous prime is 21434434201399. The next prime is 21434434201451. The reversal of 21434434201444 is 44410243443412.

It is a junction number, because it is equal to n+sod(n) for n = 21434434201397 and 21434434201406.

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, 5940805902 + ... + 5940809509.

It is an arithmetic number, because the mean of its divisors is an integer number (1746597465564).

Almost surely, 2^{21434434201444} is an apocalyptic number.

It is an amenable number.

21434434201444 is a deficient number, since it is larger than the sum of its proper divisors (20483904972092).

21434434201444 is a wasteful number, since it uses less digits than its factorization.

21434434201444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11881615467 (or 11881615465 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 40.

Adding to 21434434201444 its reverse (44410243443412), we get a palindrome (65844677644856).

The spelling of 21434434201444 in words is "twenty-one trillion, four hundred thirty-four billion, four hundred thirty-four million, two hundred one thousand, four hundred forty-four".