20171013644 has 12 divisors (see below), whose sum is σ = 35305825800. Its totient is φ = 10083634848.

The previous prime is 20171013619. The next prime is 20171013649. The reversal of 20171013644 is 44631017102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20171013649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443609 + ... + 486960.

It is an arithmetic number, because the mean of its divisors is an integer number (2942152150).

Almost surely, 2^20171013644 is an apocalyptic number.

It is an amenable number.

20171013644 is a deficient number, since it is larger than the sum of its proper divisors (15134812156).

20171013644 is a wasteful number, since it uses less digits than its factorization.

20171013644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935992 (or 935990 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The spelling of 20171013644 in words is "twenty billion, one hundred seventy-one million, thirteen thousand, six hundred forty-four".