2020042991 has 2 divisors, whose sum is σ = 2020042992. Its totient is φ = 2020042990.

The previous prime is 2020042979. The next prime is 2020043021. The reversal of 2020042991 is 1992400202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2020042991 - 2¹⁰ = 2020041967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020042951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010021495 + 1010021496.

It is an arithmetic number, because the mean of its divisors is an integer number (1010021496).

Almost surely, 2^2020042991 is an apocalyptic number.

2020042991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020042991 is an equidigital number, since it uses as much as digits as its factorization.

2020042991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 2020042991 is about 44944.8883745415. Note that the first 3 decimals coincide. The cubic root of 2020042991 is about 1264.1158326574.

The spelling of 2020042991 in words is "two billion, twenty million, forty-two thousand, nine hundred ninety-one".