2021316845 has 16 divisors (see below), whose sum is σ = 2521169280. Its totient is φ = 1554381504.

The previous prime is 2021316793. The next prime is 2021316937. The reversal of 2021316845 is 5486131202.

It is not a de Polignac number, because 2021316845 - 2¹⁴ = 2021300461 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50465 + ... + 81174.

It is an arithmetic number, because the mean of its divisors is an integer number (157573080).

Almost surely, 2^2021316845 is an apocalyptic number.

It is an amenable number.

2021316845 is a deficient number, since it is larger than the sum of its proper divisors (499852435).

2021316845 is a wasteful number, since it uses less digits than its factorization.

2021316845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131764.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 2021316845 is about 44959.0574300663. The cubic root of 2021316845 is about 1264.3814970759.

The spelling of 2021316845 in words is "two billion, twenty-one million, three hundred sixteen thousand, eight hundred forty-five".