19872485 has 4 divisors (see below), whose sum is σ = 23846988. Its totient is φ = 15897984.

The previous prime is 19872481. The next prime is 19872491. The reversal of 19872485 is 58427891.

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 10349089 + 9523396 = 3217^2 + 3086^2 .

It is a cyclic number.

It is not a de Polignac number, because 19872485 - 2² = 19872481 is a prime.

It is a super-3 number, since 3×19872485³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19872481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1987244 + ... + 1987253.

It is an arithmetic number, because the mean of its divisors is an integer number (5961747).

Almost surely, 2^19872485 is an apocalyptic number.

It is an amenable number.

19872485 is a deficient number, since it is larger than the sum of its proper divisors (3974503).

19872485 is an equidigital number, since it uses as much as digits as its factorization.

19872485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974502.

The product of its digits is 161280, while the sum is 44.

The square root of 19872485 is about 4457.8565477144. The cubic root of 19872485 is about 270.8636496767.

The spelling of 19872485 in words is "nineteen million, eight hundred seventy-two thousand, four hundred eighty-five".