19485666 has 48 divisors (see below), whose sum is σ = 43580160. Its totient is φ = 6289920.

The previous prime is 19485637. The next prime is 19485667. The reversal of 19485666 is 66658491.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (19485667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100866 + ... + 101058.

It is an arithmetic number, because the mean of its divisors is an integer number (907920).

Almost surely, 2^19485666 is an apocalyptic number.

19485666 is an abundant number, since it is smaller than the sum of its proper divisors (24094494).

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

19485666 is a wasteful number, since it uses less digits than its factorization.

19485666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 348 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 19485666 is about 4414.2571288950. The cubic root of 19485666 is about 269.0946631820.

The spelling of 19485666 in words is "nineteen million, four hundred eighty-five thousand, six hundred sixty-six".