18448730 has 16 divisors (see below), whose sum is σ = 33463584. Its totient is φ = 7322640.

The previous prime is 18448709. The next prime is 18448739. The reversal of 18448730 is 3784481.

It is a happy number.

It is a super-2 number, since 2×18448730² = 680711277225800, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18448739) 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, 5732 + ... + 8351.

It is an arithmetic number, because the mean of its divisors is an integer number (2091474).

Almost surely, 2^18448730 is an apocalyptic number.

18448730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18448730 is a deficient number, since it is larger than the sum of its proper divisors (15014854).

18448730 is a wasteful number, since it uses less digits than its factorization.

18448730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14221.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 18448730 is about 4295.1984820262. The cubic root of 18448730 is about 264.2340765231.

The spelling of 18448730 in words is "eighteen million, four hundred forty-eight thousand, seven hundred thirty".