20268340066278 has 16 divisors (see below), whose sum is σ = 45040755702960. Its totient is φ = 6756113355408.

The previous prime is 20268340066267. The next prime is 20268340066291. The reversal of 20268340066278 is 87266004386202.

20268340066278 is a `hidden beast` number, since 2 + 0 + 2 + 6 + 8 + 3 + 4 + 0 + 0 + 6 + 627 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 375339630857 = 20268340066278 / (2 + 0 + 2 + 6 + 8 + 3 + 4 + 0 + 0 + 6 + 6 + 2 + 7 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187669815375 + ... + 187669815482.

It is an arithmetic number, because the mean of its divisors is an integer number (2815047231435).

Almost surely, 2^{20268340066278} is an apocalyptic number.

20268340066278 is an abundant number, since it is smaller than the sum of its proper divisors (24772415636682).

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

20268340066278 is a wasteful number, since it uses less digits than its factorization.

20268340066278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375339630868 (or 375339630862 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 20268340066278 in words is "twenty trillion, two hundred sixty-eight billion, three hundred forty million, sixty-six thousand, two hundred seventy-eight".