20570101 has 2 divisors, whose sum is σ = 20570102. Its totient is φ = 20570100.

The previous prime is 20570093. The next prime is 20570117. The reversal of 20570101 is 10107502.

It is an a-pointer prime, because the next prime (20570117) can be obtained adding 20570101 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14062500 + 6507601 = 3750^2 + 2551^2 .

It is a cyclic number.

It is not a de Polignac number, because 20570101 - 2³ = 20570093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20570171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10285050 + 10285051.

It is an arithmetic number, because the mean of its divisors is an integer number (10285051).

Almost surely, 2^20570101 is an apocalyptic number.

It is an amenable number.

20570101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20570101 is an equidigital number, since it uses as much as digits as its factorization.

20570101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 20570101 is about 4535.4273227558. The cubic root of 20570101 is about 273.9967898819.

Adding to 20570101 its reverse (10107502), we get a palindrome (30677603).

The spelling of 20570101 in words is "twenty million, five hundred seventy thousand, one hundred one".