20057871 has 8 divisors (see below), whose sum is σ = 26871424. Its totient is φ = 13308120.

The previous prime is 20057833. The next prime is 20057887. The reversal of 20057871 is 17875002.

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 20057871 - 2⁷ = 20057743 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 (20057801) 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, 15211 + ... + 16476.

It is an arithmetic number, because the mean of its divisors is an integer number (3358928).

Almost surely, 2^20057871 is an apocalyptic number.

20057871 is a deficient number, since it is larger than the sum of its proper divisors (6813553).

20057871 is a wasteful number, since it uses less digits than its factorization.

20057871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31901.

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

The square root of 20057871 is about 4478.6014558118. The cubic root of 20057871 is about 271.7033196476.

The spelling of 20057871 in words is "twenty million, fifty-seven thousand, eight hundred seventy-one".