20181000011 has 2 divisors, whose sum is σ = 20181000012. Its totient is φ = 20181000010.

The previous prime is 20180999987. The next prime is 20181000023. The reversal of 20181000011 is 11000018102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20181000011 - 2²² = 20176805707 is a prime.

It is a super-2 number, since 2×20181000011² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20181000011.

It is not a weakly prime, because it can be changed into another prime (20181000811) 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, 10090500005 + 10090500006.

It is an arithmetic number, because the mean of its divisors is an integer number (10090500006).

Almost surely, 2^20181000011 is an apocalyptic number.

20181000011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20181000011 is an equidigital number, since it uses as much as digits as its factorization.

20181000011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20181000011 its reverse (11000018102), we get a palindrome (31181018113).

The spelling of 20181000011 in words is "twenty billion, one hundred eighty-one million, eleven", and thus it is an aban number.