2104731220640 has 24 divisors (see below), whose sum is σ = 4972427509140. Its totient is φ = 841892488192.

The previous prime is 2104731220597. The next prime is 2104731220649. The reversal of 2104731220640 is 460221374012.

It can be written as a sum of positive squares in 2 ways, for example, as 2047635073936 + 57096146704 = 1430956^2 + 238948^2 .

It is a super-2 number, since 2×2104731220640² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 2104731220597 and 2104731220606.

It is not an unprimeable number, because it can be changed into a prime (2104731220649) 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 3 ways as a sum of consecutive naturals, for example, 6577284905 + ... + 6577285224.

Almost surely, 2^{2104731220640} is an apocalyptic number.

2104731220640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2104731220640 is an abundant number, since it is smaller than the sum of its proper divisors (2867696288500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2104731220640 is a wasteful number, since it uses less digits than its factorization.

2104731220640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13154570144 (or 13154570136 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

Adding to 2104731220640 its reverse (460221374012), we get a palindrome (2564952594652).

The spelling of 2104731220640 in words is "two trillion, one hundred four billion, seven hundred thirty-one million, two hundred twenty thousand, six hundred forty".