18010729 has 12 divisors (see below), whose sum is σ = 20224512. Its totient is φ = 16019960.

The previous prime is 18010723. The next prime is 18010757. The reversal of 18010729 is 92701081.

It is not a de Polignac number, because 18010729 - 2⁵ = 18010697 is a prime.

It is a super-2 number, since 2×18010729² = 648772718222882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18010697 and 18010706.

It is not an unprimeable number, because it can be changed into a prime (18010723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4104 + ... + 7270.

It is an arithmetic number, because the mean of its divisors is an integer number (1685376).

Almost surely, 2^18010729 is an apocalyptic number.

It is an amenable number.

18010729 is a deficient number, since it is larger than the sum of its proper divisors (2213783).

18010729 is a wasteful number, since it uses less digits than its factorization.

18010729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236 (or 3225 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 18010729 is about 4243.9049235345. The cubic root of 18010729 is about 262.1261993277.

It can be divided in two parts, 1801072 and 9, that added together give a palindrome (1801081).

The spelling of 18010729 in words is "eighteen million, ten thousand, seven hundred twenty-nine".