20268071 has 4 divisors (see below), whose sum is σ = 20967000. Its totient is φ = 19569144.

The previous prime is 20268049. The next prime is 20268077. The reversal of 20268071 is 17086202.

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 20268071 - 2¹⁴ = 20251687 is a prime.

It is a super-2 number, since 2×20268071² = 821589404122082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20268071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20268077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349421 + ... + 349478.

It is an arithmetic number, because the mean of its divisors is an integer number (5241750).

Almost surely, 2^20268071 is an apocalyptic number.

20268071 is a deficient number, since it is larger than the sum of its proper divisors (698929).

20268071 is an equidigital number, since it uses as much as digits as its factorization.

20268071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698928.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 20268071 is about 4502.0074411311. The cubic root of 20268071 is about 272.6491442906.

The spelling of 20268071 in words is "twenty million, two hundred sixty-eight thousand, seventy-one".