2000821578 has 32 divisors (see below), whose sum is σ = 4574641536. Its totient is φ = 571496448.

The previous prime is 2000821547. The next prime is 2000821633. The reversal of 2000821578 is 8751280002.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252850 + ... + 260642.

It is an arithmetic number, because the mean of its divisors is an integer number (142957548).

Almost surely, 2^2000821578 is an apocalyptic number.

2000821578 is an abundant number, since it is smaller than the sum of its proper divisors (2573819958).

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

2000821578 is a wasteful number, since it uses less digits than its factorization.

2000821578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13918.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 2000821578 is about 44730.5441281458. The cubic root of 2000821578 is about 1260.0935468465.

The spelling of 2000821578 in words is "two billion, eight hundred twenty-one thousand, five hundred seventy-eight".