2040721317 has 32 divisors (see below), whose sum is σ = 3064176000. Its totient is φ = 1342154880.

The previous prime is 2040721307. The next prime is 2040721339. The reversal of 2040721317 is 7131270402.

It is a happy number.

It is not a de Polignac number, because 2040721317 - 2⁸ = 2040721061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040721307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1659859 + ... + 1661087.

It is an arithmetic number, because the mean of its divisors is an integer number (95755500).

Almost surely, 2^2040721317 is an apocalyptic number.

2040721317 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2040721317 is a deficient number, since it is larger than the sum of its proper divisors (1023454683).

2040721317 is a wasteful number, since it uses less digits than its factorization.

2040721317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018 (or 2012 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 2040721317 is about 45174.3435702169. The cubic root of 2040721317 is about 1268.4146040517.

Adding to 2040721317 its reverse (7131270402), we get a palindrome (9171991719).

The spelling of 2040721317 in words is "two billion, forty million, seven hundred twenty-one thousand, three hundred seventeen".