20408196 has 12 divisors (see below), whose sum is σ = 47619152. Its totient is φ = 6802728.

The previous prime is 20408191. The next prime is 20408231. The reversal of 20408196 is 69180402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20408191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850330 + ... + 850353.

Almost surely, 2^20408196 is an apocalyptic number.

It is an amenable number.

20408196 is an abundant number, since it is smaller than the sum of its proper divisors (27210956).

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

20408196 is a wasteful number, since it uses less digits than its factorization.

20408196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700690 (or 1700688 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 20408196 is about 4517.5431375915. The cubic root of 20408196 is about 273.2760293646.

Adding to 20408196 its reverse (69180402), we get a palindrome (89588598).

The spelling of 20408196 in words is "twenty million, four hundred eight thousand, one hundred ninety-six".