18281450 has 48 divisors (see below), whose sum is σ = 38006496. Its totient is φ = 6484800.

The previous prime is 18281447. The next prime is 18281489. The reversal of 18281450 is 5418281.

It is a super-2 number, since 2×18281450² = 668422828205000, which contains 22 as substring.

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, 23264 + ... + 24036.

It is an arithmetic number, because the mean of its divisors is an integer number (791802).

Almost surely, 2^18281450 is an apocalyptic number.

18281450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18281450 is an abundant number, since it is smaller than the sum of its proper divisors (19725046).

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

18281450 is a wasteful number, since it uses less digits than its factorization.

18281450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 18281450 is about 4275.6812322716. The cubic root of 18281450 is about 263.4330214178.

The spelling of 18281450 in words is "eighteen million, two hundred eighty-one thousand, four hundred fifty".