21342020441 has 8 divisors (see below), whose sum is σ = 24407701824. Its totient is φ = 18280544400.

The previous prime is 21342020437. The next prime is 21342020461. The reversal of 21342020441 is 14402024312.

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 21342020441 - 2² = 21342020437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342020461) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1040450 + ... + 1060763.

It is an arithmetic number, because the mean of its divisors is an integer number (3050962728).

Almost surely, 2^21342020441 is an apocalyptic number.

It is an amenable number.

21342020441 is a deficient number, since it is larger than the sum of its proper divisors (3065681383).

21342020441 is a wasteful number, since it uses less digits than its factorization.

21342020441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102671.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21342020441 its reverse (14402024312), we get a palindrome (35744044753).

The spelling of 21342020441 in words is "twenty-one billion, three hundred forty-two million, twenty thousand, four hundred forty-one".