20341021 has 8 divisors (see below), whose sum is σ = 21013344. Its totient is φ = 19677840.

The previous prime is 20341019. The next prime is 20341037. The reversal of 20341021 is 12014302.

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 20341021 - 2¹ = 20341019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20340992 and 20341010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20341081) 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, 2391 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (2626668).

Almost surely, 2^20341021 is an apocalyptic number.

It is an amenable number.

20341021 is a deficient number, since it is larger than the sum of its proper divisors (672323).

20341021 is a wasteful number, since it uses less digits than its factorization.

20341021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4571.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20341021 is about 4510.1021052743. The cubic root of 20341021 is about 272.9758640838.

Adding to 20341021 its reverse (12014302), we get a palindrome (32355323).

The spelling of 20341021 in words is "twenty million, three hundred forty-one thousand, twenty-one".