20826404 has 12 divisors (see below), whose sum is σ = 36529164. Its totient is φ = 10389504.

The previous prime is 20826397. The next prime is 20826409. The reversal of 20826404 is 40462802.

It can be written as a sum of positive squares in 2 ways, for example, as 16826404 + 4000000 = 4102^2 + 2000^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20826409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3869 + ... + 7524.

It is an arithmetic number, because the mean of its divisors is an integer number (3044097).

Almost surely, 2^20826404 is an apocalyptic number.

It is an amenable number.

20826404 is a deficient number, since it is larger than the sum of its proper divisors (15702760).

20826404 is a wasteful number, since it uses less digits than its factorization.

20826404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11854 (or 11852 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 20826404 is about 4563.5955123126. The cubic root of 20826404 is about 275.1300938189.

The spelling of 20826404 in words is "twenty million, eight hundred twenty-six thousand, four hundred four".