2021840031 has 16 divisors (see below), whose sum is σ = 2756694528. Its totient is φ = 1317513600.

The previous prime is 2021840017. The next prime is 2021840053. The reversal of 2021840031 is 1300481202.

2021840031 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2021840031 - 2⁵ = 2021839999 is a prime.

It is a super-2 number, since 2×2021840031² = 8175674221908161922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021840731) 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, 105511 + ... + 123191.

It is an arithmetic number, because the mean of its divisors is an integer number (172293408).

Almost surely, 2^2021840031 is an apocalyptic number.

2021840031 is a deficient number, since it is larger than the sum of its proper divisors (734854497).

2021840031 is a wasteful number, since it uses less digits than its factorization.

2021840031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18542.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 2021840031 is about 44964.8755252364. The cubic root of 2021840031 is about 1264.4905760714.

The spelling of 2021840031 in words is "two billion, twenty-one million, eight hundred forty thousand, thirty-one".