2020421291 has 4 divisors (see below), whose sum is σ = 2309052912. Its totient is φ = 1731789672.

The previous prime is 2020421281. The next prime is 2020421303. The reversal of 2020421291 is 1921240202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2020421291 - 2¹⁴ = 2020404907 is a prime.

It is a super-2 number, since 2×2020421291² = 8164204386252213362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2020421281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144315800 + ... + 144315813.

It is an arithmetic number, because the mean of its divisors is an integer number (577263228).

Almost surely, 2^2020421291 is an apocalyptic number.

2020421291 is a deficient number, since it is larger than the sum of its proper divisors (288631621).

2020421291 is an equidigital number, since it uses as much as digits as its factorization.

2020421291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288631620.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2020421291 is about 44949.0966650054. The cubic root of 2020421291 is about 1264.1947394220.

Adding to 2020421291 its reverse (1921240202), we get a palindrome (3941661493).

The spelling of 2020421291 in words is "two billion, twenty million, four hundred twenty-one thousand, two hundred ninety-one".