20162857 has 32 divisors (see below), whose sum is σ = 25683840. Its totient is φ = 15552000.

The previous prime is 20162851. The next prime is 20162869. The reversal of 20162857 is 75826102.

It is a cyclic number.

It is not a de Polignac number, because 20162857 - 2¹¹ = 20160809 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20162851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111307 + ... + 111487.

It is an arithmetic number, because the mean of its divisors is an integer number (802620).

Almost surely, 2^20162857 is an apocalyptic number.

It is an amenable number.

20162857 is a deficient number, since it is larger than the sum of its proper divisors (5520983).

20162857 is a wasteful number, since it uses less digits than its factorization.

20162857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 20162857 is about 4490.3070050944. The cubic root of 20162857 is about 272.1765407049.

Adding to 20162857 its reverse (75826102), we get a palindrome (95988959).

The spelling of 20162857 in words is "twenty million, one hundred sixty-two thousand, eight hundred fifty-seven".