21342440041 has 8 divisors (see below), whose sum is σ = 23005019520. Its totient is φ = 19682839632.

The previous prime is 21342440039. The next prime is 21342440057. The reversal of 21342440041 is 14004424312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21342440041 - 2¹ = 21342440039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21342439988 and 21342440015.

It is not an unprimeable number, because it can be changed into a prime (21342440081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729871 + ... + 758548.

It is an arithmetic number, because the mean of its divisors is an integer number (2875627440).

Almost surely, 2^21342440041 is an apocalyptic number.

It is an amenable number.

21342440041 is a deficient number, since it is larger than the sum of its proper divisors (1662579479).

21342440041 is a wasteful number, since it uses less digits than its factorization.

21342440041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489535.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21342440041 its reverse (14004424312), we get a palindrome (35346864353).

The spelling of 21342440041 in words is "twenty-one billion, three hundred forty-two million, four hundred forty thousand, forty-one".