20715101 has 4 divisors (see below), whose sum is σ = 22598304. Its totient is φ = 18831900.

The previous prime is 20715091. The next prime is 20715113. The reversal of 20715101 is 10151702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20715101 - 2²² = 16520797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20715101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20715901) 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 in 3 ways as a sum of consecutive naturals, for example, 941585 + ... + 941606.

It is an arithmetic number, because the mean of its divisors is an integer number (5649576).

Almost surely, 2^20715101 is an apocalyptic number.

It is an amenable number.

20715101 is a deficient number, since it is larger than the sum of its proper divisors (1883203).

20715101 is a wasteful number, since it uses less digits than its factorization.

20715101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883202.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 20715101 is about 4551.3845146285. The cubic root of 20715101 is about 274.6390901858.

Adding to 20715101 its reverse (10151702), we get a palindrome (30866803).

The spelling of 20715101 in words is "twenty million, seven hundred fifteen thousand, one hundred one".