20479804 has 12 divisors (see below), whose sum is σ = 36209824. Its totient is φ = 10134144.

The previous prime is 20479801. The next prime is 20479807. The reversal of 20479804 is 40897402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20479801) and next prime (20479807).

It is a self number, because there is not a number n which added to its sum of digits gives 20479804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20479801) 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, 26004 + ... + 26779.

Almost surely, 2^20479804 is an apocalyptic number.

It is an amenable number.

20479804 is a deficient number, since it is larger than the sum of its proper divisors (15730020).

20479804 is a wasteful number, since it uses less digits than its factorization.

20479804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52884 (or 52882 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20479804 is about 4525.4617443969. The cubic root of 20479804 is about 273.5952786653.

It can be divided in two parts, 204 and 79804, that added together give a palindrome (80008).

The spelling of 20479804 in words is "twenty million, four hundred seventy-nine thousand, eight hundred four".