19985495 has 8 divisors (see below), whose sum is σ = 24809760. Its totient is φ = 15436960.

The previous prime is 19985467. The next prime is 19985501. The reversal of 19985495 is 59458991.

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

It is not a de Polignac number, because 19985495 - 2⁶ = 19985431 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68771 + ... + 69060.

It is an arithmetic number, because the mean of its divisors is an integer number (3101220).

Almost surely, 2^19985495 is an apocalyptic number.

19985495 is a deficient number, since it is larger than the sum of its proper divisors (4824265).

19985495 is a wasteful number, since it uses less digits than its factorization.

19985495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137865.

The product of its digits is 583200, while the sum is 50.

The square root of 19985495 is about 4470.5139525562. The cubic root of 19985495 is about 271.3761247433.

The spelling of 19985495 in words is "nineteen million, nine hundred eighty-five thousand, four hundred ninety-five".