20011002097 has 2 divisors, whose sum is σ = 20011002098. Its totient is φ = 20011002096.

The previous prime is 20011002079. The next prime is 20011002101. The reversal of 20011002097 is 79020011002.

Together with previous prime (20011002079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11084720656 + 8926281441 = 105284^2 + 94479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011002097 is a prime.

It is a super-2 number, since 2×20011002097² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20011002007) 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, 10005501048 + 10005501049.

It is an arithmetic number, because the mean of its divisors is an integer number (10005501049).

Almost surely, 2^20011002097 is an apocalyptic number.

It is an amenable number.

20011002097 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011002097 is an equidigital number, since it uses as much as digits as its factorization.

20011002097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

Adding to 20011002097 its reverse (79020011002), we get a palindrome (99031013099).

The spelling of 20011002097 in words is "twenty billion, eleven million, two thousand, ninety-seven".