20813618337147 has 24 divisors (see below), whose sum is σ = 31216425505200. Its totient is φ = 13347467544768.

The previous prime is 20813618337137. The next prime is 20813618337209. The reversal of 20813618337147 is 74173381631802.

20813618337147 is a `hidden beast` number, since 2 + 0 + 8 + 1 + 3 + 618 + 3 + 3 + 7 + 14 + 7 = 666.

It is not a de Polignac number, because 20813618337147 - 2¹⁰ = 20813618336123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20813618337093 and 20813618337102.

It is not an unprimeable number, because it can be changed into a prime (20813618337137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148155933 + ... + 148296350.

It is an arithmetic number, because the mean of its divisors is an integer number (1300684396050).

Almost surely, 2^{20813618337147} is an apocalyptic number.

20813618337147 is a deficient number, since it is larger than the sum of its proper divisors (10402807168053).

20813618337147 is a wasteful number, since it uses less digits than its factorization.

20813618337147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296452587 (or 296452584 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

Adding to 20813618337147 its reverse (74173381631802), we get a palindrome (94986999968949).

The spelling of 20813618337147 in words is "twenty trillion, eight hundred thirteen billion, six hundred eighteen million, three hundred thirty-seven thousand, one hundred forty-seven".