20302021 has 8 divisors (see below), whose sum is σ = 20891520. Its totient is φ = 19720272.

The previous prime is 20302019. The next prime is 20302027. The reversal of 20302021 is 12020302.

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 20302021 - 2¹ = 20302019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20301989 and 20302007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302027) 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, 3600 + ... + 7318.

It is an arithmetic number, because the mean of its divisors is an integer number (2611440).

Almost surely, 2^20302021 is an apocalyptic number.

It is an amenable number.

20302021 is a deficient number, since it is larger than the sum of its proper divisors (589499).

20302021 is a wasteful number, since it uses less digits than its factorization.

20302021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20302021 is about 4505.7764036845. The cubic root of 20302021 is about 272.8012928749.

Adding to 20302021 its reverse (12020302), we get a palindrome (32322323).

The spelling of 20302021 in words is "twenty million, three hundred two thousand, twenty-one".