18072829 has 8 divisors (see below), whose sum is σ = 18954360. Its totient is φ = 17208576.

The previous prime is 18072827. The next prime is 18072833. The reversal of 18072829 is 92827081.

It can be written as a sum of positive squares in 4 ways, for example, as 6749604 + 11323225 = 2598^2 + 3365^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18072829 - 2¹ = 18072827 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18072823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2152 + ... + 6385.

It is an arithmetic number, because the mean of its divisors is an integer number (2369295).

Almost surely, 2^18072829 is an apocalyptic number.

It is an amenable number.

18072829 is a deficient number, since it is larger than the sum of its proper divisors (881531).

18072829 is an equidigital number, since it uses as much as digits as its factorization.

18072829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8639.

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

The square root of 18072829 is about 4251.2150027963. The cubic root of 18072829 is about 262.4271192986.

It can be divided in two parts, 1807 and 2829, that multiplied together give a triangular number (5112003 = T₃₁₉₇).

The spelling of 18072829 in words is "eighteen million, seventy-two thousand, eight hundred twenty-nine".