19660494 has 16 divisors (see below), whose sum is σ = 44938368. Its totient is φ = 5617272.

The previous prime is 19660477. The next prime is 19660499. The reversal of 19660494 is 49406691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19660499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234012 + ... + 234095.

It is an arithmetic number, because the mean of its divisors is an integer number (2808648).

Almost surely, 2^19660494 is an apocalyptic number.

19660494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19660494 is an abundant number, since it is smaller than the sum of its proper divisors (25277874).

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

19660494 is a wasteful number, since it uses less digits than its factorization.

19660494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468119.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 19660494 is about 4434.0155615424. The cubic root of 19660494 is about 269.8970526593.

The spelling of 19660494 in words is "nineteen million, six hundred sixty thousand, four hundred ninety-four".