18241730 has 16 divisors (see below), whose sum is σ = 35361144. Its totient is φ = 6735360.

The previous prime is 18241693. The next prime is 18241787. The reversal of 18241730 is 3714281.

It can be written as a sum of positive squares in 4 ways, for example, as 13476241 + 4765489 = 3671^2 + 2183^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 18241730.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70031 + ... + 70290.

Almost surely, 2^18241730 is an apocalyptic number.

18241730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18241730 is a deficient number, since it is larger than the sum of its proper divisors (17119414).

18241730 is a wasteful number, since it uses less digits than its factorization.

18241730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140341.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 18241730 is about 4271.0338326920. The cubic root of 18241730 is about 263.2420966132.

The spelling of 18241730 in words is "eighteen million, two hundred forty-one thousand, seven hundred thirty".