2021000033 has 16 divisors (see below), whose sum is σ = 2190184080. Its totient is φ = 1853819136.

The previous prime is 2021000029. The next prime is 2021000083. The reversal of 2021000033 is 3300001202.

It can be written as a sum of positive squares in 8 ways, for example, as 677329 + 2020322704 = 823^2 + 44948^2 .

It is not a de Polignac number, because 2021000033 - 2² = 2021000029 is a prime.

It is a super-2 number, since 2×2021000033² = 8168882266772002178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020999978 and 2021000023.

It is not an unprimeable number, because it can be changed into a prime (2021000083) 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, 2437463 + ... + 2438291.

It is an arithmetic number, because the mean of its divisors is an integer number (136886505).

Almost surely, 2^2021000033 is an apocalyptic number.

It is an amenable number.

2021000033 is a deficient number, since it is larger than the sum of its proper divisors (169184047).

2021000033 is a wasteful number, since it uses less digits than its factorization.

2021000033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 2021000033 is about 44955.5339530074. The cubic root of 2021000033 is about 1264.3154358246.

Adding to 2021000033 its reverse (3300001202), we get a palindrome (5321001235).

The spelling of 2021000033 in words is "two billion, twenty-one million, thirty-three", and thus it is an aban number and an uban number.