18450340 has 12 divisors (see below), whose sum is σ = 38745756. Its totient is φ = 7380128.

The previous prime is 18450329. The next prime is 18450359. The reversal of 18450340 is 4305481.

It can be written as a sum of positive squares in 2 ways, for example, as 3504384 + 14945956 = 1872^2 + 3866^2 .

It is a super-2 number, since 2×18450340² = 680830092231200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461239 + ... + 461278.

It is an arithmetic number, because the mean of its divisors is an integer number (3228813).

Almost surely, 2^18450340 is an apocalyptic number.

18450340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18450340 is an abundant number, since it is smaller than the sum of its proper divisors (20295416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18450340 is a wasteful number, since it uses less digits than its factorization.

18450340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922526 (or 922524 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 18450340 is about 4295.3858965173. The cubic root of 18450340 is about 264.2417627701.

The spelling of 18450340 in words is "eighteen million, four hundred fifty thousand, three hundred forty".