2021852991 has 16 divisors (see below), whose sum is σ = 2803729280. Its totient is φ = 1294967520.

The previous prime is 2021852983. The next prime is 2021853011. The reversal of 2021852991 is 1992581202.

It is not a de Polignac number, because 2021852991 - 2³ = 2021852983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021852951) 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, 120601 + ... + 136338.

It is an arithmetic number, because the mean of its divisors is an integer number (175233080).

Almost surely, 2^2021852991 is an apocalyptic number.

2021852991 is a deficient number, since it is larger than the sum of its proper divisors (781876289).

2021852991 is a wasteful number, since it uses less digits than its factorization.

2021852991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257046.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 2021852991 is about 44965.0196374915. The cubic root of 2021852991 is about 1264.4932778616.

The spelling of 2021852991 in words is "two billion, twenty-one million, eight hundred fifty-two thousand, nine hundred ninety-one".