20023100081 has 2 divisors, whose sum is σ = 20023100082. Its totient is φ = 20023100080.

The previous prime is 20023100063. The next prime is 20023100131. The reversal of 20023100081 is 18000132002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19548513856 + 474586225 = 139816^2 + 21785^2 .

It is a cyclic number.

It is not a de Polignac number, because 20023100081 - 2⁶ = 20023100017 is a prime.

It is a super-2 number, since 2×20023100081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20023100681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011550040 + 10011550041.

It is an arithmetic number, because the mean of its divisors is an integer number (10011550041).

Almost surely, 2^20023100081 is an apocalyptic number.

It is an amenable number.

20023100081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20023100081 is an equidigital number, since it uses as much as digits as its factorization.

20023100081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20023100081 its reverse (18000132002), we get a palindrome (38023232083).

The spelling of 20023100081 in words is "twenty billion, twenty-three million, one hundred thousand, eighty-one".