20830804 has 12 divisors (see below), whose sum is σ = 36506484. Its totient is φ = 10400384.

The previous prime is 20830751. The next prime is 20830807. The reversal of 20830804 is 40803802.

It can be written as a sum of positive squares in 2 ways, for example, as 5244100 + 15586704 = 2290^2 + 3948^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20830807) 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, 277 + ... + 6460.

It is an arithmetic number, because the mean of its divisors is an integer number (3042207).

Almost surely, 2^20830804 is an apocalyptic number.

It is an amenable number.

20830804 is a deficient number, since it is larger than the sum of its proper divisors (15675680).

20830804 is a wasteful number, since it uses less digits than its factorization.

20830804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7514 (or 7512 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 20830804 is about 4564.0775628817. The cubic root of 20830804 is about 275.1494680577.

The spelling of 20830804 in words is "twenty million, eight hundred thirty thousand, eight hundred four".