2021018473 has 2 divisors, whose sum is σ = 2021018474. Its totient is φ = 2021018472.

The previous prime is 2021018459. The next prime is 2021018513. The reversal of 2021018473 is 3748101202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1083923929 + 937094544 = 32923^2 + 30612^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021018473 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021018413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010509236 + 1010509237.

It is an arithmetic number, because the mean of its divisors is an integer number (1010509237).

Almost surely, 2^2021018473 is an apocalyptic number.

It is an amenable number.

2021018473 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021018473 is an equidigital number, since it uses as much as digits as its factorization.

2021018473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 2021018473 is about 44955.7390440865. The cubic root of 2021018473 is about 1264.3192811001.

Adding to 2021018473 its reverse (3748101202), we get a palindrome (5769119675).

It can be divided in two parts, 20210 and 18473, that added together give a palindrome (38683).

The spelling of 2021018473 in words is "two billion, twenty-one million, eighteen thousand, four hundred seventy-three".