20320025313040 has 20 divisors (see below), whose sum is σ = 47244058853004. Its totient is φ = 8128010125184.

The previous prime is 20320025312963. The next prime is 20320025313043. The reversal of 20320025313040 is 4031352002302.

It can be written as a sum of positive squares in 2 ways, for example, as 13224685003776 + 7095340309264 = 3636576^2 + 2663708^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 20320025312996 and 20320025313014.

It is not an unprimeable number, because it can be changed into a prime (20320025313043) 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, 127000158127 + ... + 127000158286.

Almost surely, 2^{20320025313040} is an apocalyptic number.

20320025313040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20320025313040 is an abundant number, since it is smaller than the sum of its proper divisors (26924033539964).

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

20320025313040 is a wasteful number, since it uses less digits than its factorization.

20320025313040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254000316426 (or 254000316420 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 20320025313040 its reverse (4031352002302), we get a palindrome (24351377315342).

The spelling of 20320025313040 in words is "twenty trillion, three hundred twenty billion, twenty-five million, three hundred thirteen thousand, forty".