20171008407 has 16 divisors (see below), whose sum is σ = 29608824960. Its totient is φ = 12112696800.

The previous prime is 20171008337. The next prime is 20171008411. The reversal of 20171008407 is 70480017102.

It is not a de Polignac number, because 20171008407 - 2⁷ = 20171008279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20171006407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2800269 + ... + 2807462.

It is an arithmetic number, because the mean of its divisors is an integer number (1850551560).

Almost surely, 2^20171008407 is an apocalyptic number.

20171008407 is a deficient number, since it is larger than the sum of its proper divisors (9437816553).

20171008407 is a wasteful number, since it uses less digits than its factorization.

20171008407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5607854.

The product of its (nonzero) digits is 3136, while the sum is 30.

The spelling of 20171008407 in words is "twenty billion, one hundred seventy-one million, eight thousand, four hundred seven".