20357201 has 2 divisors, whose sum is σ = 20357202. Its totient is φ = 20357200.

The previous prime is 20357171. The next prime is 20357203. The reversal of 20357201 is 10275302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14592400 + 5764801 = 3820^2 + 2401^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20357201 is a prime.

Together with 20357203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20357203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10178600 + 10178601.

It is an arithmetic number, because the mean of its divisors is an integer number (10178601).

Almost surely, 2^20357201 is an apocalyptic number.

It is an amenable number.

20357201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20357201 is an equidigital number, since it uses as much as digits as its factorization.

20357201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20357201 is about 4511.8954996764. The cubic root of 20357201 is about 273.0482232657.

The spelling of 20357201 in words is "twenty million, three hundred fifty-seven thousand, two hundred one".