18666050 has 54 divisors (see below), whose sum is σ = 38411883. Its totient is φ = 6745440.

The previous prime is 18666049. The next prime is 18666071. The reversal of 18666050 is 5066681.

It can be written as a sum of positive squares in 5 ways, for example, as 1168561 + 17497489 = 1081^2 + 4183^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3055.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18665998 and 18666016.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 397127 + ... + 397173.

Almost surely, 2^18666050 is an apocalyptic number.

18666050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18666050 is an abundant number, since it is smaller than the sum of its proper divisors (19745833).

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

18666050 is a wasteful number, since it uses less digits than its factorization.

18666050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 18666050 is about 4320.4224330498. The cubic root of 18666050 is about 265.2675593610.

Multiplying 18666050 by its sum of digits (32), we get a square (597313600 = 24440²).

The spelling of 18666050 in words is "eighteen million, six hundred sixty-six thousand, fifty".