20019826 has 8 divisors (see below), whose sum is σ = 30159324. Its totient is φ = 9966720.

The previous prime is 20019817. The next prime is 20019827. The reversal of 20019826 is 62891002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17214201 + 2805625 = 4149^2 + 1675^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20019794 and 20019803.

It is not an unprimeable number, because it can be changed into a prime (20019827) 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, 21015 + ... + 21946.

Almost surely, 2^20019826 is an apocalyptic number.

20019826 is a deficient number, since it is larger than the sum of its proper divisors (10139498).

20019826 is a wasteful number, since it uses less digits than its factorization.

20019826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43196.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20019826 is about 4474.3520201254. The cubic root of 20019826 is about 271.5314254442.

The spelling of 20019826 in words is "twenty million, nineteen thousand, eight hundred twenty-six".