19872986 has 16 divisors (see below), whose sum is σ = 34712064. Its totient is φ = 8355984.

The previous prime is 19872961. The next prime is 19872991. The reversal of 19872986 is 68927891.

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, 12650 + ... + 14133.

It is an arithmetic number, because the mean of its divisors is an integer number (2169504).

Almost surely, 2^19872986 is an apocalyptic number.

19872986 is a deficient number, since it is larger than the sum of its proper divisors (14839078).

19872986 is a wasteful number, since it uses less digits than its factorization.

19872986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26845.

The product of its digits is 435456, while the sum is 50.

The square root of 19872986 is about 4457.9127402855. The cubic root of 19872986 is about 270.8659258817.

The spelling of 19872986 in words is "nineteen million, eight hundred seventy-two thousand, nine hundred eighty-six".