13819986 has 24 divisors (see below), whose sum is σ = 30910464. Its totient is φ = 4457880.

The previous prime is 13819957. The next prime is 13819991. The reversal of 13819986 is 68991831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11826 + ... + 12941.

It is an arithmetic number, because the mean of its divisors is an integer number (1287936).

Almost surely, 2^13819986 is an apocalyptic number.

13819986 is an abundant number, since it is smaller than the sum of its proper divisors (17090478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13819986 is a wasteful number, since it uses less digits than its factorization.

13819986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24806 (or 24803 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 13819986 is about 3717.5241761151. The cubic root of 13819986 is about 239.9767685847.

The spelling of 13819986 in words is "thirteen million, eight hundred nineteen thousand, nine hundred eighty-six".