20012154240040 has 16 divisors (see below), whose sum is σ = 45027347040180. Its totient is φ = 8004861696000.

The previous prime is 20012154239983. The next prime is 20012154240077. The reversal of 20012154240040 is 4004245121002.

It can be written as a sum of positive squares in 2 ways, for example, as 19131683544484 + 880470695556 = 4373978^2 + 938334^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20012154239987 and 20012154240014.

It is an unprimeable number.

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, 250151927961 + ... + 250151928040.

Almost surely, 2^{20012154240040} is an apocalyptic number.

20012154240040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012154240040 is an abundant number, since it is smaller than the sum of its proper divisors (25015192800140).

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

20012154240040 is a wasteful number, since it uses less digits than its factorization.

20012154240040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500303856012 (or 500303856008 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 20012154240040 its reverse (4004245121002), we get a palindrome (24016399361042).

The spelling of 20012154240040 in words is "twenty trillion, twelve billion, one hundred fifty-four million, two hundred forty thousand, forty".