21342020041 has 8 divisors (see below), whose sum is σ = 21890904200. Its totient is φ = 20799555840.

The previous prime is 21342020023. The next prime is 21342020057. The reversal of 21342020041 is 14002024312.

It can be written as a sum of positive squares in 4 ways, for example, as 2653641 + 21339366400 = 1629^2 + 146080^2 .

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 21342020041 - 2¹³ = 21342011849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342060041) 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, 1598256 + ... + 1611553.

It is an arithmetic number, because the mean of its divisors is an integer number (2736363025).

Almost surely, 2^21342020041 is an apocalyptic number.

It is an amenable number.

21342020041 is a deficient number, since it is larger than the sum of its proper divisors (548884159).

21342020041 is a wasteful number, since it uses less digits than its factorization.

21342020041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3209979.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21342020041 its reverse (14002024312), we get a palindrome (35344044353).

The spelling of 21342020041 in words is "twenty-one billion, three hundred forty-two million, twenty thousand, forty-one".