20826098994578 has 16 divisors (see below), whose sum is σ = 32093410880664. Its totient is φ = 10128470123520.

The previous prime is 20826098994551. The next prime is 20826098994599. The reversal of 20826098994578 is 87549989062802.

It can be written as a sum of positive squares in 4 ways, for example, as 20797549147489 + 28549847089 = 4560433^2 + 168967^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20826098994499 and 20826098994508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43448975 + ... + 43925682.

Almost surely, 2^{20826098994578} is an apocalyptic number.

20826098994578 is a deficient number, since it is larger than the sum of its proper divisors (11267311886086).

20826098994578 is a wasteful number, since it uses less digits than its factorization.

20826098994578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87377917.

The product of its (nonzero) digits is 1254113280, while the sum is 77.

The spelling of 20826098994578 in words is "twenty trillion, eight hundred twenty-six billion, ninety-eight million, nine hundred ninety-four thousand, five hundred seventy-eight".