20704308 has 12 divisors (see below), whose sum is σ = 48310080. Its totient is φ = 6901432.

The previous prime is 20704279. The next prime is 20704309. The reversal of 20704308 is 80340702.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20704309) 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, 862668 + ... + 862691.

It is an arithmetic number, because the mean of its divisors is an integer number (4025840).

Almost surely, 2^20704308 is an apocalyptic number.

It is an amenable number.

20704308 is an abundant number, since it is smaller than the sum of its proper divisors (27605772).

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

20704308 is a wasteful number, since it uses less digits than its factorization.

20704308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725366 (or 1725364 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20704308 is about 4550.1986769810. The cubic root of 20704308 is about 274.5913843334.

It can be divided in two parts, 20704 and 308, that added together give a palindrome (21012).

The spelling of 20704308 in words is "twenty million, seven hundred four thousand, three hundred eight".