2005534423240 has 16 divisors (see below), whose sum is σ = 4512452452380. Its totient is φ = 802213769280.

The previous prime is 2005534423237. The next prime is 2005534423241. The reversal of 2005534423240 is 423244355002.

It can be written as a sum of positive squares in 2 ways, for example, as 1903721100516 + 101813322724 = 1379754^2 + 319082^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2005534423196 and 2005534423205.

It is not an unprimeable number, because it can be changed into a prime (2005534423241) 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, 25069180251 + ... + 25069180330.

Almost surely, 2^{2005534423240} is an apocalyptic number.

2005534423240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2005534423240 is an abundant number, since it is smaller than the sum of its proper divisors (2506918029140).

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

2005534423240 is a wasteful number, since it uses less digits than its factorization.

2005534423240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50138360592 (or 50138360588 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 34.

Adding to 2005534423240 its reverse (423244355002), we get a palindrome (2428778778242).

The spelling of 2005534423240 in words is "two trillion, five billion, five hundred thirty-four million, four hundred twenty-three thousand, two hundred forty".