2020021139 has 2 divisors, whose sum is σ = 2020021140. Its totient is φ = 2020021138.

The previous prime is 2020021121. The next prime is 2020021181. The reversal of 2020021139 is 9311200202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2020021139 - 2¹⁶ = 2019955603 is a prime.

It is a super-4 number, since 4×2020021139⁴ (a number of 38 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2020021139.

It is not a weakly prime, because it can be changed into another prime (2020021739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010010569 + 1010010570.

It is an arithmetic number, because the mean of its divisors is an integer number (1010010570).

Almost surely, 2^2020021139 is an apocalyptic number.

2020021139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020021139 is an equidigital number, since it uses as much as digits as its factorization.

2020021139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2020021139 is about 44944.6452761617. The cubic root of 2020021139 is about 1264.1112744114. Note that the first 3 decimals are identical.

The spelling of 2020021139 in words is "two billion, twenty million, twenty-one thousand, one hundred thirty-nine".