20704104 has 24 divisors (see below), whose sum is σ = 56073810. Its totient is φ = 6901344.

The previous prime is 20704093. The next prime is 20704141. The reversal of 20704104 is 40140702.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12236004 + 8468100 = 3498^2 + 2910^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143707 + ... + 143850.

Almost surely, 2^20704104 is an apocalyptic number.

20704104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20704104 is an abundant number, since it is smaller than the sum of its proper divisors (35369706).

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

20704104 is a wasteful number, since it uses less digits than its factorization.

20704104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287569 (or 287562 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20704104 is about 4550.1762603222. The cubic root of 20704104 is about 274.5904824788.

Adding to 20704104 its reverse (40140702), we get a palindrome (60844806).

The spelling of 20704104 in words is "twenty million, seven hundred four thousand, one hundred four".