18105450 has 48 divisors (see below), whose sum is σ = 48987936. Its totient is φ = 4388800.

The previous prime is 18105433. The next prime is 18105467. The reversal of 18105450 is 5450181.

18105450 = 107² + 108² + ... + 381².

It is an interprime number because it is at equal distance from previous prime (18105433) and next prime (18105467).

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 18105450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3837 + ... + 7136.

It is an arithmetic number, because the mean of its divisors is an integer number (1020582).

Almost surely, 2^18105450 is an apocalyptic number.

18105450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18105450 is an abundant number, since it is smaller than the sum of its proper divisors (30882486).

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

18105450 is a wasteful number, since it uses less digits than its factorization.

18105450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10999 (or 10994 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 18105450 is about 4255.0499409525. The cubic root of 18105450 is about 262.5849158384.

It can be divided in two parts, 1810 and 5450, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 18105450 in words is "eighteen million, one hundred five thousand, four hundred fifty".