19494985 has 8 divisors (see below), whose sum is σ = 23453640. Its totient is φ = 15556224.

The previous prime is 19494949. The next prime is 19495009. The reversal of 19494985 is 58949491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2742336 + 16752649 = 1656^2 + 4093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19494985 - 2¹³ = 19486793 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 2722 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (2931705).

Almost surely, 2^19494985 is an apocalyptic number.

It is an amenable number.

19494985 is a deficient number, since it is larger than the sum of its proper divisors (3958655).

19494985 is an equidigital number, since it uses as much as digits as its factorization.

19494985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9947.

The product of its digits is 466560, while the sum is 49.

The square root of 19494985 is about 4415.3125597176. The cubic root of 19494985 is about 269.1375544284.

The spelling of 19494985 in words is "nineteen million, four hundred ninety-four thousand, nine hundred eighty-five".