21035504341 has 4 divisors (see below), whose sum is σ = 21055908384. Its totient is φ = 21015100300.

The previous prime is 21035504327. The next prime is 21035504383. The reversal of 21035504341 is 14340553012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21035504341 - 2¹⁵ = 21035471573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035504311) 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 3 ways as a sum of consecutive naturals, for example, 10200475 + ... + 10202536.

It is an arithmetic number, because the mean of its divisors is an integer number (5263977096).

Almost surely, 2^21035504341 is an apocalyptic number.

It is an amenable number.

21035504341 is a deficient number, since it is larger than the sum of its proper divisors (20404043).

21035504341 is a wasteful number, since it uses less digits than its factorization.

21035504341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20404042.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 21035504341 in words is "twenty-one billion, thirty-five million, five hundred four thousand, three hundred forty-one".