18072830 has 16 divisors (see below), whose sum is σ = 32944320. Its totient is φ = 7137312.

The previous prime is 18072827. The next prime is 18072833. The reversal of 18072830 is 3827081.

It is an interprime number because it is at equal distance from previous prime (18072827) and next prime (18072833).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18072793 and 18072802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18072833) 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, 10649 + ... + 12228.

It is an arithmetic number, because the mean of its divisors is an integer number (2059020).

Almost surely, 2^18072830 is an apocalyptic number.

18072830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18072830 is a deficient number, since it is larger than the sum of its proper divisors (14871490).

18072830 is a wasteful number, since it uses less digits than its factorization.

18072830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22963.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 18072830 is about 4251.2151204097. The cubic root of 18072830 is about 262.4271241388.

The spelling of 18072830 in words is "eighteen million, seventy-two thousand, eight hundred thirty".