20021301 has 12 divisors (see below), whose sum is σ = 28960620. Its totient is φ = 13328640.

The previous prime is 20021299. The next prime is 20021303. The reversal of 20021301 is 10312002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20021299) and next prime (20021303).

It can be written as a sum of positive squares in 2 ways, for example, as 8468100 + 11553201 = 2910^2 + 3399^2 .

It is not a de Polignac number, because 20021301 - 2¹ = 20021299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8581 + ... + 10661.

It is an arithmetic number, because the mean of its divisors is an integer number (2413385).

Almost surely, 2^20021301 is an apocalyptic number.

It is an amenable number.

20021301 is a deficient number, since it is larger than the sum of its proper divisors (8939319).

20021301 is a wasteful number, since it uses less digits than its factorization.

20021301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3156 (or 3153 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20021301 is about 4474.5168454259. The cubic root of 20021301 is about 271.5380938175.

Adding to 20021301 its reverse (10312002), we get a palindrome (30333303).

The spelling of 20021301 in words is "twenty million, twenty-one thousand, three hundred one".