2021984731 has 16 divisors (see below), whose sum is σ = 2305900800. Its totient is φ = 1757589408.

The previous prime is 2021984711. The next prime is 2021984737. The reversal of 2021984731 is 1374891202.

It is a cyclic number.

It is not a de Polignac number, because 2021984731 - 2⁹ = 2021984219 is a prime.

It is a super-2 number, since 2×2021984731² = 8176844504794284722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021984737) 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, 16740 + ... + 65758.

It is an arithmetic number, because the mean of its divisors is an integer number (144118800).

Almost surely, 2^2021984731 is an apocalyptic number.

2021984731 is a deficient number, since it is larger than the sum of its proper divisors (283916069).

2021984731 is a wasteful number, since it uses less digits than its factorization.

2021984731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49218.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 2021984731 is about 44966.4845301476. The cubic root of 2021984731 is about 1264.5207412375.

The spelling of 2021984731 in words is "two billion, twenty-one million, nine hundred eighty-four thousand, seven hundred thirty-one".