20011023013 has 2 divisors, whose sum is σ = 20011023014. Its totient is φ = 20011023012.

The previous prime is 20011022989. The next prime is 20011023059. The reversal of 20011023013 is 31032011002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20004707844 + 6315169 = 141438^2 + 2513^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011023013 - 2⁹ = 20011022501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20011022984 and 20011023002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011023073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005511506 + 10005511507.

It is an arithmetic number, because the mean of its divisors is an integer number (10005511507).

Almost surely, 2^20011023013 is an apocalyptic number.

It is an amenable number.

20011023013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011023013 is an equidigital number, since it uses as much as digits as its factorization.

20011023013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20011023013 its reverse (31032011002), we get a palindrome (51043034015).

The spelling of 20011023013 in words is "twenty billion, eleven million, twenty-three thousand, thirteen".