20171007 has 12 divisors (see below), whose sum is σ = 29266120. Its totient is φ = 13387248.

The previous prime is 20170963. The next prime is 20171017. The reversal of 20171007 is 70017102.

It is not a de Polignac number, because 20171007 - 2⁷ = 20170879 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 (20171017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2833 + ... + 6954.

Almost surely, 2^20171007 is an apocalyptic number.

20171007 is a deficient number, since it is larger than the sum of its proper divisors (9095113).

20171007 is a wasteful number, since it uses less digits than its factorization.

20171007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10022 (or 10019 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 18.

The square root of 20171007 is about 4491.2144237389. The cubic root of 20171007 is about 272.2132077969.

Adding to 20171007 its reverse (70017102), we get a palindrome (90188109).

The spelling of 20171007 in words is "twenty million, one hundred seventy-one thousand, seven".