20170057 has 8 divisors (see below), whose sum is σ = 21726720. Its totient is φ = 18670080.

The previous prime is 20170049. The next prime is 20170061. The reversal of 20170057 is 75007102.

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

It is a cyclic number.

It is not a de Polignac number, because 20170057 - 2³ = 20170049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20170027) 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, 13432 + ... + 14857.

It is an arithmetic number, because the mean of its divisors is an integer number (2715840).

Almost surely, 2^20170057 is an apocalyptic number.

It is an amenable number.

20170057 is a deficient number, since it is larger than the sum of its proper divisors (1556663).

20170057 is a wasteful number, since it uses less digits than its factorization.

20170057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28343.

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 20170057 is about 4491.1086604535. The cubic root of 20170057 is about 272.2089342273.

Adding to 20170057 its reverse (75007102), we get a palindrome (95177159).

The spelling of 20170057 in words is "twenty million, one hundred seventy thousand, fifty-seven".