20875071 has 8 divisors (see below), whose sum is σ = 31809664. Its totient is φ = 11928600.

The previous prime is 20875069. The next prime is 20875093. The reversal of 20875071 is 17057802.

It is a happy number.

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

It is not a de Polignac number, because 20875071 - 2¹ = 20875069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20875051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497005 + ... + 497046.

It is an arithmetic number, because the mean of its divisors is an integer number (3976208).

Almost surely, 2^20875071 is an apocalyptic number.

20875071 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20875071 is a deficient number, since it is larger than the sum of its proper divisors (10934593).

20875071 is an equidigital number, since it uses as much as digits as its factorization.

20875071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994061.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 20875071 is about 4568.9244905120. The cubic root of 20875071 is about 275.3442344854.

The spelling of 20875071 in words is "twenty million, eight hundred seventy-five thousand, seventy-one".