2001018973 has 2 divisors, whose sum is σ = 2001018974. Its totient is φ = 2001018972.

The previous prime is 2001018961. The next prime is 2001018989. The reversal of 2001018973 is 3798101002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1145280964 + 855738009 = 33842^2 + 29253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001018973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001018913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000509486 + 1000509487.

It is an arithmetic number, because the mean of its divisors is an integer number (1000509487).

Almost surely, 2^2001018973 is an apocalyptic number.

It is an amenable number.

2001018973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001018973 is an equidigital number, since it uses as much as digits as its factorization.

2001018973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 2001018973 is about 44732.7505637648. The cubic root of 2001018973 is about 1260.1349844887.

Adding to 2001018973 its reverse (3798101002), we get a palindrome (5799119975).

It can be divided in two parts, 20010 and 18973, that added together give a palindrome (38983).

The spelling of 2001018973 in words is "two billion, one million, eighteen thousand, nine hundred seventy-three".