20704120 has 16 divisors (see below), whose sum is σ = 46584360. Its totient is φ = 8281632.

The previous prime is 20704093. The next prime is 20704141. The reversal of 20704120 is 2140702.

It is a junction number, because it is equal to n+sod(n) for n = 20704094 and 20704103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258762 + ... + 258841.

Almost surely, 2^20704120 is an apocalyptic number.

20704120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20704120 is an abundant number, since it is smaller than the sum of its proper divisors (25880240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20704120 is a wasteful number, since it uses less digits than its factorization.

20704120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517614 (or 517610 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 20704120 is about 4550.1780184955. The cubic root of 20704120 is about 274.5905532127.

Adding to 20704120 its reverse (2140702), we get a palindrome (22844822).

The spelling of 20704120 in words is "twenty million, seven hundred four thousand, one hundred twenty".