20814404 has 12 divisors (see below), whose sum is σ = 39227244. Its totient is φ = 9606624.

The previous prime is 20814403. The next prime is 20814439. The reversal of 20814404 is 40441802.

It can be written as a sum of positive squares in 2 ways, for example, as 12974404 + 7840000 = 3602^2 + 2800^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20814404.

It is not an unprimeable number, because it can be changed into a prime (20814403) 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, 200087 + ... + 200190.

It is an arithmetic number, because the mean of its divisors is an integer number (3268937).

Almost surely, 2^20814404 is an apocalyptic number.

It is an amenable number.

20814404 is a deficient number, since it is larger than the sum of its proper divisors (18412840).

20814404 is a wasteful number, since it uses less digits than its factorization.

20814404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400294 (or 400292 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 20814404 is about 4562.2805700658. The cubic root of 20814404 is about 275.0772411127.

The spelling of 20814404 in words is "twenty million, eight hundred fourteen thousand, four hundred four".