2021684675 has 12 divisors (see below), whose sum is σ = 2507446656. Its totient is φ = 1616988000.

The previous prime is 2021684671. The next prime is 2021684681. The reversal of 2021684675 is 5764861202.

It is not a de Polignac number, because 2021684675 - 2² = 2021684671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021684671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216350 + ... + 225500.

It is an arithmetic number, because the mean of its divisors is an integer number (208953888).

Almost surely, 2^2021684675 is an apocalyptic number.

2021684675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2021684675 is a deficient number, since it is larger than the sum of its proper divisors (485761981).

2021684675 is an equidigital number, since it uses as much as digits as its factorization.

2021684675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17998 (or 17993 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 2021684675 is about 44963.1479658620. The cubic root of 2021684675 is about 1264.4581878793.

The spelling of 2021684675 in words is "two billion, twenty-one million, six hundred eighty-four thousand, six hundred seventy-five".