20731301 has 2 divisors, whose sum is σ = 20731302.
Its totient is φ = 20731300.
The previous prime is 20731283. The next prime is 20731307. The reversal of 20731301 is 10313702.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 19228225 + 1503076 = 4385^2 + 1226^2
It is a cyclic number.
It is not a de Polignac number, because 20731301 - 210 = 20730277 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 20731301.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (20731307) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10365650 + 10365651.
It is an arithmetic number, because the mean of its divisors is an integer number (10365651).
Almost surely, 220731301 is an apocalyptic number.
It is an amenable number.
20731301 is a deficient number, since it is larger than the sum of its proper divisors (1).
20731301 is an equidigital number, since it uses as much as digits as its factorization.
20731301 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 126, while the sum is 17.
The square root of 20731301 is about 4553.1638450642.
The cubic root of 20731301 is about 274.7106642831.
The spelling of 20731301 in words is "twenty million, seven hundred thirty-one thousand, three hundred one".