2021868506 has 32 divisors (see below), whose sum is σ = 3555135360. Its totient is φ = 844300800.

The previous prime is 2021868461. The next prime is 2021868523. The reversal of 2021868506 is 6058681202.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021868506.

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, 577421 + ... + 580911.

It is an arithmetic number, because the mean of its divisors is an integer number (111097980).

Almost surely, 2^2021868506 is an apocalyptic number.

2021868506 is a deficient number, since it is larger than the sum of its proper divisors (1533266854).

2021868506 is a wasteful number, since it uses less digits than its factorization.

2021868506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4550.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 2021868506 is about 44965.1921601587. The cubic root of 2021868506 is about 1264.4965122812.

The spelling of 2021868506 in words is "two billion, twenty-one million, eight hundred sixty-eight thousand, five hundred six".