2021984149 has 4 divisors (see below), whose sum is σ = 2049682636. Its totient is φ = 1994285664.

The previous prime is 2021984071. The next prime is 2021984189. The reversal of 2021984149 is 9414891202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 949749124 + 1072235025 = 30818^2 + 32745^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021984149 - 2¹⁵ = 2021951381 is a prime.

It is a super-3 number, since 3×2021984149³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021984189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13849134 + ... + 13849279.

It is an arithmetic number, because the mean of its divisors is an integer number (512420659).

Almost surely, 2^2021984149 is an apocalyptic number.

It is an amenable number.

2021984149 is a deficient number, since it is larger than the sum of its proper divisors (27698487).

2021984149 is an equidigital number, since it uses as much as digits as its factorization.

2021984149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27698486.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 2021984149 is about 44966.4780586605. The cubic root of 2021984149 is about 1264.5206199127.

The spelling of 2021984149 in words is "two billion, twenty-one million, nine hundred eighty-four thousand, one hundred forty-nine".