18074900 has 18 divisors (see below), whose sum is σ = 39222750. Its totient is φ = 7229920.

The previous prime is 18074899. The next prime is 18074923. The reversal of 18074900 is 947081.

It can be written as a sum of positive squares in 3 ways, for example, as 198916 + 17875984 = 446^2 + 4228^2 .

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 90275 + ... + 90474.

Almost surely, 2^18074900 is an apocalyptic number.

18074900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18074900 is an abundant number, since it is smaller than the sum of its proper divisors (21147850).

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

18074900 is a wasteful number, since it uses less digits than its factorization.

18074900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180763 (or 180756 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 18074900 is about 4251.4585732428. The cubic root of 18074900 is about 262.4371429240.

The spelling of 18074900 in words is "eighteen million, seventy-four thousand, nine hundred".