21713021341 has 4 divisors (see below), whose sum is σ = 23686932384. Its totient is φ = 19739110300.

The previous prime is 21713021339. The next prime is 21713021347. The reversal of 21713021341 is 14312031712.

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 21713021341 - 2¹ = 21713021339 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 (21713021347) 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, 986955505 + ... + 986955526.

It is an arithmetic number, because the mean of its divisors is an integer number (5921733096).

Almost surely, 2^21713021341 is an apocalyptic number.

It is an amenable number.

21713021341 is a deficient number, since it is larger than the sum of its proper divisors (1973911043).

21713021341 is a wasteful number, since it uses less digits than its factorization.

21713021341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973911042.

The product of its (nonzero) digits is 1008, while the sum is 25.

The spelling of 21713021341 in words is "twenty-one billion, seven hundred thirteen million, twenty-one thousand, three hundred forty-one".