18011000129 has 2 divisors, whose sum is σ = 18011000130. Its totient is φ = 18011000128.

The previous prime is 18011000107. The next prime is 18011000131. The reversal of 18011000129 is 92100011081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11231124529 + 6779875600 = 105977^2 + 82340^2 .

It is a cyclic number.

It is not a de Polignac number, because 18011000129 - 2¹² = 18010996033 is a prime.

It is a super-2 number, since 2×18011000129² (a number of 21 digits) contains 22 as substring.

Together with 18011000131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18011000929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9005500064 + 9005500065.

It is an arithmetic number, because the mean of its divisors is an integer number (9005500065).

Almost surely, 2^18011000129 is an apocalyptic number.

It is an amenable number.

18011000129 is a deficient number, since it is larger than the sum of its proper divisors (1).

18011000129 is an equidigital number, since it uses as much as digits as its factorization.

18011000129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 18011000129 in words is "eighteen billion, eleven million, one hundred twenty-nine", and thus it is an aban number.