20310001 has 2 divisors, whose sum is σ = 20310002. Its totient is φ = 20310000.

The previous prime is 20309999. The next prime is 20310007. The reversal of 20310001 is 10001302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20205025 + 104976 = 4495^2 + 324^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310001 - 2¹ = 20309999 is a prime.

It is a super-3 number, since 3×20310001³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 20309999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20310007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155000 + 10155001.

It is an arithmetic number, because the mean of its divisors is an integer number (10155001).

Almost surely, 2^20310001 is an apocalyptic number.

It is an amenable number.

20310001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310001 is an equidigital number, since it uses as much as digits as its factorization.

20310001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 20310001 is about 4506.6618466444. The cubic root of 20310001 is about 272.8370310107.

Adding to 20310001 its reverse (10001302), we get a palindrome (30311303).

The spelling of 20310001 in words is "twenty million, three hundred ten thousand, one".