20021030001017 has 4 divisors (see below), whose sum is σ = 20039758748580. Its totient is φ = 20002301253456.

The previous prime is 20021030001001. The next prime is 20021030001059. The reversal of 20021030001017 is 71010003012002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5150975219776 + 14870054781241 = 2269576^2 + 3856171^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021030001017 - 2⁴ = 20021030001001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021030000986 and 20021030001004.

It is not an unprimeable number, because it can be changed into a prime (20021030021017) 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, 9364372178 + ... + 9364374315.

It is an arithmetic number, because the mean of its divisors is an integer number (5009939687145).

Almost surely, 2^{20021030001017} is an apocalyptic number.

It is an amenable number.

20021030001017 is a deficient number, since it is larger than the sum of its proper divisors (18728747563).

20021030001017 is a wasteful number, since it uses less digits than its factorization.

20021030001017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18728747562.

The product of its (nonzero) digits is 84, while the sum is 17.

Adding to 20021030001017 its reverse (71010003012002), we get a palindrome (91031033013019).

The spelling of 20021030001017 in words is "twenty trillion, twenty-one billion, thirty million, one thousand, seventeen".