18264729 has 16 divisors (see below), whose sum is σ = 27901952. Its totient is φ = 10410768.

The previous prime is 18264707. The next prime is 18264767. The reversal of 18264729 is 92746281.

It is not a de Polignac number, because 18264729 - 2⁷ = 18264601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18264769) 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, 10152 + ... + 11814.

It is an arithmetic number, because the mean of its divisors is an integer number (1743872).

Almost surely, 2^18264729 is an apocalyptic number.

It is an amenable number.

18264729 is a deficient number, since it is larger than the sum of its proper divisors (9637223).

18264729 is a wasteful number, since it uses less digits than its factorization.

18264729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196.

The product of its digits is 48384, while the sum is 39.

The square root of 18264729 is about 4273.7254240300. The cubic root of 18264729 is about 263.3526811969.

It can be divided in two parts, 1826 and 4729, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 18264729 in words is "eighteen million, two hundred sixty-four thousand, seven hundred twenty-nine".