20854551055860 has 144 divisors (see below), whose sum is σ = 63355556025216. Its totient is φ = 5552710592256.

The previous prime is 20854551055853. The next prime is 20854551055867. The reversal of 20854551055860 is 6855015545802.

It is a happy number.

20854551055860 is a `hidden beast` number, since 2 + 0 + 8 + 5 + 4 + 5 + 51 + 0 + 5 + 586 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (20854551055853) and next prime (20854551055867).

It is a junction number, because it is equal to n+sod(n) for n = 20854551055797 and 20854551055806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20854551055867) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1264900537 + ... + 1264917023.

It is an arithmetic number, because the mean of its divisors is an integer number (439969139064).

Almost surely, 2^{20854551055860} is an apocalyptic number.

20854551055860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20854551055860 is an abundant number, since it is smaller than the sum of its proper divisors (42501004969356).

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

20854551055860 is a wasteful number, since it uses less digits than its factorization.

20854551055860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26822 (or 26817 counting only the distinct ones).

The product of its (nonzero) digits is 9600000, while the sum is 54.

The spelling of 20854551055860 in words is "twenty trillion, eight hundred fifty-four billion, five hundred fifty-one million, fifty-five thousand, eight hundred sixty".