20171011 has 4 divisors (see below), whose sum is σ = 23052592. Its totient is φ = 17289432.

The previous prime is 20170963. The next prime is 20171017. The reversal of 20171011 is 11017102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11017102 = 2 ⋅5508551.

It is a cyclic number.

It is not a de Polignac number, because 20171011 - 2⁹ = 20170499 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20170982 and 20171000.

It is not an unprimeable number, because it can be changed into a prime (20171017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440780 + ... + 1440793.

It is an arithmetic number, because the mean of its divisors is an integer number (5763148).

Almost surely, 2^20171011 is an apocalyptic number.

20171011 is a deficient number, since it is larger than the sum of its proper divisors (2881581).

20171011 is an equidigital number, since it uses as much as digits as its factorization.

20171011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2881580.

The product of its (nonzero) digits is 14, while the sum is 13.

The square root of 20171011 is about 4491.2148690527. The cubic root of 20171011 is about 272.2132257906.

Adding to 20171011 its reverse (11017102), we get a palindrome (31188113).

It can be divided in two parts, 2017101 and 1, that added together give a palindrome (2017102).

The spelling of 20171011 in words is "twenty million, one hundred seventy-one thousand, eleven".