20821341 has 8 divisors (see below), whose sum is σ = 28048384. Its totient is φ = 13737600.

The previous prime is 20821327. The next prime is 20821349. The reversal of 20821341 is 14312802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20821341 - 2⁵ = 20821309 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 (20821349) 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, 35485 + ... + 36066.

It is an arithmetic number, because the mean of its divisors is an integer number (3506048).

Almost surely, 2^20821341 is an apocalyptic number.

It is an amenable number.

20821341 is a deficient number, since it is larger than the sum of its proper divisors (7227043).

20821341 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 11 representation: 20821341 = (10831422)₁₁.

20821341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71651.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20821341 is about 4563.0407624741. The cubic root of 20821341 is about 275.1077968578.

The spelling of 20821341 in words is "twenty million, eight hundred twenty-one thousand, three hundred forty-one".