20286404 has 24 divisors (see below), whose sum is σ = 36622656. Its totient is φ = 9828000.

The previous prime is 20286403. The next prime is 20286419. The reversal of 20286404 is 40468202.

It is not an unprimeable number, because it can be changed into a prime (20286401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16739 + ... + 17909.

It is an arithmetic number, because the mean of its divisors is an integer number (1525944).

Almost surely, 2^20286404 is an apocalyptic number.

It is an amenable number.

20286404 is a deficient number, since it is larger than the sum of its proper divisors (16336252).

20286404 is a wasteful number, since it uses less digits than its factorization.

20286404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307 (or 1305 counting only the distinct ones).

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

The square root of 20286404 is about 4504.0430726182. The cubic root of 20286404 is about 272.7313256098.

The spelling of 20286404 in words is "twenty million, two hundred eighty-six thousand, four hundred four".