20686704478382 has 16 divisors (see below), whose sum is σ = 31421585703312. Its totient is φ = 10212982838400.

The previous prime is 20686704478373. The next prime is 20686704478417. The reversal of 20686704478382 is 28387440768602.

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, 34769369 + ... + 35359332.

It is an arithmetic number, because the mean of its divisors is an integer number (1963849106457).

Almost surely, 2^{20686704478382} is an apocalyptic number.

20686704478382 is a deficient number, since it is larger than the sum of its proper divisors (10734881224930).

20686704478382 is a wasteful number, since it uses less digits than its factorization.

20686704478382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70130563.

The product of its (nonzero) digits is 173408256, while the sum is 65.

The spelling of 20686704478382 in words is "twenty trillion, six hundred eighty-six billion, seven hundred four million, four hundred seventy-eight thousand, three hundred eighty-two".