21342043044 has 36 divisors (see below), whose sum is σ = 61654791744. Its totient is φ = 6097726512.

The previous prime is 21342043007. The next prime is 21342043061. The reversal of 21342043044 is 44034024312.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21342042999 and 21342043017.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42345072 + ... + 42345575.

It is an arithmetic number, because the mean of its divisors is an integer number (1712633104).

Almost surely, 2^21342043044 is an apocalyptic number.

It is an amenable number.

21342043044 is an abundant number, since it is smaller than the sum of its proper divisors (40312748700).

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

21342043044 is a wasteful number, since it uses less digits than its factorization.

21342043044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84690664 (or 84690659 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21342043044 its reverse (44034024312), we get a palindrome (65376067356).

The spelling of 21342043044 in words is "twenty-one billion, three hundred forty-two million, forty-three thousand, forty-four".