20046221578 has 8 divisors (see below), whose sum is σ = 30119366340. Its totient is φ = 10006432800.

The previous prime is 20046221543. The next prime is 20046221581. The reversal of 20046221578 is 87512264002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15618250729 + 4427970849 = 124973^2 + 66543^2 .

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

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, 8337493 + ... + 8339896.

Almost surely, 2^20046221578 is an apocalyptic number.

20046221578 is a deficient number, since it is larger than the sum of its proper divisors (10073144762).

20046221578 is a wasteful number, since it uses less digits than its factorization.

20046221578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16677992.

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 20046221578 in words is "twenty billion, forty-six million, two hundred twenty-one thousand, five hundred seventy-eight".