20047247540820 has 120 divisors (see below), whose sum is σ = 63537298297704. Its totient is φ = 5290819928064.

The previous prime is 20047247540717. The next prime is 20047247540867. The reversal of 20047247540820 is 2804574274002.

20047247540820 is a `hidden beast` number, since 2 + 0 + 0 + 4 + 7 + 24 + 7 + 540 + 82 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5375145486096 + 14672102054724 = 2318436^2 + 3830418^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 63630717 + ... + 63944996.

Almost surely, 2^{20047247540820} is an apocalyptic number.

20047247540820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20047247540820 is an abundant number, since it is smaller than the sum of its proper divisors (43490050756884).

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

20047247540820 is a wasteful number, since it uses less digits than its factorization.

20047247540820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127575831 (or 127575820 counting only the distinct ones).

The product of its (nonzero) digits is 1003520, while the sum is 45.

The spelling of 20047247540820 in words is "twenty trillion, forty-seven billion, two hundred forty-seven million, five hundred forty thousand, eight hundred twenty".