20855420115868 has 12 divisors (see below), whose sum is σ = 39304445603080. Its totient is φ = 9625578514992.

The previous prime is 20855420115841. The next prime is 20855420115883. The reversal of 20855420115868 is 86851102455802.

It is a happy number.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200532885678 + ... + 200532885781.

Almost surely, 2^{20855420115868} is an apocalyptic number.

It is an amenable number.

20855420115868 is a deficient number, since it is larger than the sum of its proper divisors (18449025487212).

20855420115868 is a wasteful number, since it uses less digits than its factorization.

20855420115868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401065771476 (or 401065771474 counting only the distinct ones).

The product of its (nonzero) digits is 6144000, while the sum is 55.

The spelling of 20855420115868 in words is "twenty trillion, eight hundred fifty-five billion, four hundred twenty million, one hundred fifteen thousand, eight hundred sixty-eight".