20750871 has 4 divisors (see below), whose sum is σ = 27667832. Its totient is φ = 13833912.

The previous prime is 20750867. The next prime is 20750927. The reversal of 20750871 is 17805702.

It is a happy number.

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

It is not a de Polignac number, because 20750871 - 2² = 20750867 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 (20750801) 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, 3458476 + ... + 3458481.

It is an arithmetic number, because the mean of its divisors is an integer number (6916958).

Almost surely, 2^20750871 is an apocalyptic number.

20750871 is a deficient number, since it is larger than the sum of its proper divisors (6916961).

20750871 is an equidigital number, since it uses as much as digits as its factorization.

20750871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6916960.

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

The square root of 20750871 is about 4555.3123932393. The cubic root of 20750871 is about 274.7970778490.

The spelling of 20750871 in words is "twenty million, seven hundred fifty thousand, eight hundred seventy-one".