20850404 has 12 divisors (see below), whose sum is σ = 36650544. Its totient is φ = 10378824.

The previous prime is 20850367. The next prime is 20850407. The reversal of 20850404 is 40405802.

It is a self number, because there is not a number n which added to its sum of digits gives 20850404.

It is not an unprimeable number, because it can be changed into a prime (20850407) 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, 10574 + ... + 12389.

It is an arithmetic number, because the mean of its divisors is an integer number (3054212).

Almost surely, 2^20850404 is an apocalyptic number.

It is an amenable number.

20850404 is a deficient number, since it is larger than the sum of its proper divisors (15800140).

20850404 is a wasteful number, since it uses less digits than its factorization.

20850404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23194 (or 23192 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 20850404 is about 4566.2242608089. The cubic root of 20850404 is about 275.2357383560.

The spelling of 20850404 in words is "twenty million, eight hundred fifty thousand, four hundred four".