20950071 has 4 divisors (see below), whose sum is σ = 27933432. Its totient is φ = 13966712.

The previous prime is 20950063. The next prime is 20950081. The reversal of 20950071 is 17005902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20950071 - 2³ = 20950063 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20950031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3491676 + ... + 3491681.

It is an arithmetic number, because the mean of its divisors is an integer number (6983358).

Almost surely, 2^20950071 is an apocalyptic number.

20950071 is a deficient number, since it is larger than the sum of its proper divisors (6983361).

20950071 is an equidigital number, since it uses as much as digits as its factorization.

20950071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6983360.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 20950071 is about 4577.1247525057. The cubic root of 20950071 is about 275.6735928126.

Adding to 20950071 its reverse (17005902), we get a palindrome (37955973).

The spelling of 20950071 in words is "twenty million, nine hundred fifty thousand, seventy-one".