19863485 has 4 divisors (see below), whose sum is σ = 23836188. Its totient is φ = 15890784.

The previous prime is 19863449. The next prime is 19863509. The reversal of 19863485 is 58436891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13623481 + 6240004 = 3691^2 + 2498^2 .

It is a cyclic number.

It is not a de Polignac number, because 19863485 - 2¹⁰ = 19862461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1986344 + ... + 1986353.

It is an arithmetic number, because the mean of its divisors is an integer number (5959047).

Almost surely, 2^19863485 is an apocalyptic number.

It is an amenable number.

19863485 is a deficient number, since it is larger than the sum of its proper divisors (3972703).

19863485 is an equidigital number, since it uses as much as digits as its factorization.

19863485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972702.

The product of its digits is 207360, while the sum is 44.

The square root of 19863485 is about 4456.8469796483. The cubic root of 19863485 is about 270.8227532488.

The spelling of 19863485 in words is "nineteen million, eight hundred sixty-three thousand, four hundred eighty-five".