20011071 has 8 divisors (see below), whose sum is σ = 26703360. Its totient is φ = 13329752.

The previous prime is 20011067. The next prime is 20011087. The reversal of 20011071 is 17011002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20011071 - 2² = 20011067 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011001) 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 7 ways as a sum of consecutive naturals, for example, 3640 + ... + 7298.

It is an arithmetic number, because the mean of its divisors is an integer number (3337920).

Almost surely, 2^20011071 is an apocalyptic number.

20011071 is a deficient number, since it is larger than the sum of its proper divisors (6692289).

20011071 is a wasteful number, since it uses less digits than its factorization.

20011071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5485.

The product of its (nonzero) digits is 14, while the sum is 12.

The square root of 20011071 is about 4473.3735591833. The cubic root of 20011071 is about 271.4918379498.

Adding to 20011071 its reverse (17011002), we get a palindrome (37022073).

The spelling of 20011071 in words is "twenty million, eleven thousand, seventy-one".