19870085 has 8 divisors (see below), whose sum is σ = 24398880. Its totient is φ = 15526224.

The previous prime is 19870063. The next prime is 19870099. The reversal of 19870085 is 58007891.

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 19870085 - 2⁶ = 19870021 is a prime.

It is a congruent 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, 45995 + ... + 46424.

It is an arithmetic number, because the mean of its divisors is an integer number (3049860).

Almost surely, 2^19870085 is an apocalyptic number.

It is an amenable number.

19870085 is a deficient number, since it is larger than the sum of its proper divisors (4528795).

19870085 is an equidigital number, since it uses as much as digits as its factorization.

19870085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92467.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 19870085 is about 4457.5873519203. The cubic root of 19870085 is about 270.8527451701.

The spelling of 19870085 in words is "nineteen million, eight hundred seventy thousand, eighty-five".