20107688540478 has 192 divisors, whose sum is σ = 51231133829376. Its totient is φ = 5202624000000.

The previous prime is 20107688540431. The next prime is 20107688540507. The reversal of 20107688540478 is 87404588670102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1641303853 + ... + 1641316103.

It is an arithmetic number, because the mean of its divisors is an integer number (266828822028).

Almost surely, 2^{20107688540478} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20107688540478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25615566914688).

20107688540478 is an abundant number, since it is smaller than the sum of its proper divisors (31123445288898).

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

20107688540478 is a wasteful number, since it uses less digits than its factorization.

20107688540478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14199 (or 14192 counting only the distinct ones).

The product of its (nonzero) digits is 24084480, while the sum is 60.

The spelling of 20107688540478 in words is "twenty trillion, one hundred seven billion, six hundred eighty-eight million, five hundred forty thousand, four hundred seventy-eight".