2021801873 has 16 divisors (see below), whose sum is σ = 2529171456. Its totient is φ = 1573439040.

The previous prime is 2021801861. The next prime is 2021801879. The reversal of 2021801873 is 3781081202.

It is a cyclic number.

It is not a de Polignac number, because 2021801873 - 2⁶ = 2021801809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2021801879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176561 + ... + 187662.

It is an arithmetic number, because the mean of its divisors is an integer number (158073216).

Almost surely, 2^2021801873 is an apocalyptic number.

It is an amenable number.

2021801873 is a deficient number, since it is larger than the sum of its proper divisors (507369583).

2021801873 is a wasteful number, since it uses less digits than its factorization.

2021801873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364304.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 2021801873 is about 44964.4512142648. The cubic root of 2021801873 is about 1264.4826211501.

The spelling of 2021801873 in words is "two billion, twenty-one million, eight hundred one thousand, eight hundred seventy-three".