20119986 has 36 divisors (see below), whose sum is σ = 45592638. Its totient is φ = 6412032.

The previous prime is 20119969. The next prime is 20119987. The reversal of 20119986 is 68991102.

It can be written as a sum of positive squares in only one way, i.e., 20115225 + 4761 = 4485^2 + 69^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20119986.

It is not an unprimeable number, because it can be changed into a prime (20119987) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8466 + ... + 10578.

Almost surely, 2^20119986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20119986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22796319).

20119986 is an abundant number, since it is smaller than the sum of its proper divisors (25472652).

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

20119986 is a wasteful number, since it uses less digits than its factorization.

20119986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167 (or 2141 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 20119986 is about 4485.5307378280. The cubic root of 20119986 is about 271.9834999362.

The spelling of 20119986 in words is "twenty million, one hundred nineteen thousand, nine hundred eighty-six".