2021676858 has 24 divisors (see below), whose sum is σ = 4384516500. Its totient is φ = 673243584.

The previous prime is 2021676857. The next prime is 2021676869. The reversal of 2021676858 is 8586761202.

It can be written as a sum of positive squares in 2 ways, for example, as 1532957409 + 488719449 = 39153^2 + 22107^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2021676851) 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, 34653 + ... + 72416.

Almost surely, 2^2021676858 is an apocalyptic number.

2021676858 is an abundant number, since it is smaller than the sum of its proper divisors (2362839642).

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

2021676858 is a wasteful number, since it uses less digits than its factorization.

2021676858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108126 (or 108123 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 2021676858 is about 44963.0610390351. The cubic root of 2021676858 is about 1264.4565581688.

The spelling of 2021676858 in words is "two billion, twenty-one million, six hundred seventy-six thousand, eight hundred fifty-eight".