21342432441 has 8 divisors (see below), whose sum is σ = 31043538144. Its totient is φ = 12934807520.

The previous prime is 21342432439. The next prime is 21342432473. The reversal of 21342432441 is 14423424312.

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 21342432441 - 2¹ = 21342432439 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21342432399 and 21342432408.

It is not an unprimeable number, because it can be changed into a prime (21342432431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323370156 + ... + 323370221.

It is an arithmetic number, because the mean of its divisors is an integer number (3880442268).

Almost surely, 2^21342432441 is an apocalyptic number.

It is an amenable number.

21342432441 is a deficient number, since it is larger than the sum of its proper divisors (9701105703).

21342432441 is a wasteful number, since it uses less digits than its factorization.

21342432441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646740391.

The product of its digits is 18432, while the sum is 30.

Adding to 21342432441 its reverse (14423424312), we get a palindrome (35765856753).

The spelling of 21342432441 in words is "twenty-one billion, three hundred forty-two million, four hundred thirty-two thousand, four hundred forty-one".