20704146 has 16 divisors (see below), whose sum is σ = 41688000. Its totient is φ = 6854768.

The previous prime is 20704141. The next prime is 20704171. The reversal of 20704146 is 64140702.

It is not an unprimeable number, because it can be changed into a prime (20704141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10686 + ... + 12473.

It is an arithmetic number, because the mean of its divisors is an integer number (2605500).

Almost surely, 2^20704146 is an apocalyptic number.

20704146 is an abundant number, since it is smaller than the sum of its proper divisors (20983854).

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

20704146 is a wasteful number, since it uses less digits than its factorization.

20704146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23313.

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

The square root of 20704146 is about 4550.1808755257. The cubic root of 20704146 is about 274.5906681553.

Adding to 20704146 its reverse (64140702), we get a palindrome (84844848).

It can be divided in two parts, 2070 and 4146, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 20704146 in words is "twenty million, seven hundred four thousand, one hundred forty-six".