21342342044 has 12 divisors (see below), whose sum is σ = 37768752000. Its totient is φ = 10551270048.

The previous prime is 21342342037. The next prime is 21342342061. The reversal of 21342342044 is 44024324312.

It is a junction number, because it is equal to n+sod(n) for n = 21342341998 and 21342342016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29974844 + ... + 29975555.

It is an arithmetic number, because the mean of its divisors is an integer number (3147396000).

Almost surely, 2^21342342044 is an apocalyptic number.

It is an amenable number.

21342342044 is a deficient number, since it is larger than the sum of its proper divisors (16426409956).

21342342044 is a wasteful number, since it uses less digits than its factorization.

21342342044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59950492 (or 59950490 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 21342342044 its reverse (44024324312), we get a palindrome (65366666356).

The spelling of 21342342044 in words is "twenty-one billion, three hundred forty-two million, three hundred forty-two thousand, forty-four".