21343011444 has 36 divisors (see below), whose sum is σ = 53969974240. Its totient is φ = 7111754640.

The previous prime is 21343011421. The next prime is 21343011449. The reversal of 21343011444 is 44411034312.

21343011444 is a `hidden beast` number, since 213 + 4 + 3 + 0 + 1 + 1 + 444 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343011449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5734 + ... + 206685.

Almost surely, 2^21343011444 is an apocalyptic number.

It is an amenable number.

21343011444 is an abundant number, since it is smaller than the sum of its proper divisors (32626962796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21343011444 is a wasteful number, since it uses less digits than its factorization.

21343011444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215220 (or 215215 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21343011444 its reverse (44411034312), we get a palindrome (65754045756).

The spelling of 21343011444 in words is "twenty-one billion, three hundred forty-three million, eleven thousand, four hundred forty-four".