19449985 has 8 divisors (see below), whose sum is σ = 23417856. Its totient is φ = 15508080.

The previous prime is 19449979. The next prime is 19450001. The reversal of 19449985 is 58994491.

It is a happy number.

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

It is not a de Polignac number, because 19449985 - 2¹¹ = 19447937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4801 + ... + 7870.

It is an arithmetic number, because the mean of its divisors is an integer number (2927232).

Almost surely, 2^19449985 is an apocalyptic number.

It is an amenable number.

19449985 is a deficient number, since it is larger than the sum of its proper divisors (3967871).

19449985 is a wasteful number, since it uses less digits than its factorization.

19449985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12983.

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

The square root of 19449985 is about 4410.2137136425. The cubic root of 19449985 is about 268.9303127435.

The spelling of 19449985 in words is "nineteen million, four hundred forty-nine thousand, nine hundred eighty-five".