20687168535074 has 8 divisors (see below), whose sum is σ = 31228400910108. Its totient is φ = 10277701565040.

The previous prime is 20687168535043. The next prime is 20687168535101. The reversal of 20687168535074 is 47053586178602.

It can be written as a sum of positive squares in 2 ways, for example, as 20683803723025 + 3364812049 = 4547945^2 + 58007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20687168534998 and 20687168535016.

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, 32941350857 + ... + 32941351484.

Almost surely, 2^{20687168535074} is an apocalyptic number.

20687168535074 is a deficient number, since it is larger than the sum of its proper divisors (10541232375034).

20687168535074 is a wasteful number, since it uses less digits than its factorization.

20687168535074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65882702500.

The product of its (nonzero) digits is 67737600, while the sum is 62.

The spelling of 20687168535074 in words is "twenty trillion, six hundred eighty-seven billion, one hundred sixty-eight million, five hundred thirty-five thousand, seventy-four".