18124120729 has 16 divisors (see below), whose sum is σ = 22413343680. Its totient is φ = 14408573760.

The previous prime is 18124120669. The next prime is 18124120741. The reversal of 18124120729 is 92702142181.

It is a cyclic number.

It is not a de Polignac number, because 18124120729 - 2²⁵ = 18090566297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18124120799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3332602 + ... + 3338035.

It is an arithmetic number, because the mean of its divisors is an integer number (1400833980).

Almost surely, 2^18124120729 is an apocalyptic number.

18124120729 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18124120729 is a deficient number, since it is larger than the sum of its proper divisors (4289222951).

18124120729 is a wasteful number, since it uses less digits than its factorization.

18124120729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670680.

The product of its (nonzero) digits is 16128, while the sum is 37.

The spelling of 18124120729 in words is "eighteen billion, one hundred twenty-four million, one hundred twenty thousand, seven hundred twenty-nine".