20340244443240 has 48 divisors (see below), whose sum is σ = 66105794441700. Its totient is φ = 5424065184768.

The previous prime is 20340244443227. The next prime is 20340244443247. The reversal of 20340244443240 is 4234444204302.

20340244443240 is a `hidden beast` number, since 2 + 0 + 3 + 402 + 4 + 4 + 4 + 4 + 3 + 240 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19224208549764 + 1116035893476 = 4384542^2 + 1056426^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20340244443195 and 20340244443204.

It is not an unprimeable number, because it can be changed into a prime (20340244443247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28250339145 + ... + 28250339864.

Almost surely, 2^{20340244443240} is an apocalyptic number.

20340244443240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20340244443240 is an abundant number, since it is smaller than the sum of its proper divisors (45765549998460).

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

20340244443240 is a wasteful number, since it uses less digits than its factorization.

20340244443240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56500679026 (or 56500679019 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 36.

Adding to 20340244443240 its reverse (4234444204302), we get a palindrome (24574688647542).

The spelling of 20340244443240 in words is "twenty trillion, three hundred forty billion, two hundred forty-four million, four hundred forty-three thousand, two hundred forty".