20704100 has 18 divisors (see below), whose sum is σ = 44928114. Its totient is φ = 8281600.

The previous prime is 20704093. The next prime is 20704141. The reversal of 20704100 is 140702.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7279204 + 13424896 = 2698^2 + 3664^2 .

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, 103421 + ... + 103620.

Almost surely, 2^20704100 is an apocalyptic number.

20704100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20704100 is an abundant number, since it is smaller than the sum of its proper divisors (24224014).

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

20704100 is a wasteful number, since it uses less digits than its factorization.

20704100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207055 (or 207048 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 20704100 is about 4550.1758207788. The cubic root of 20704100 is about 274.5904647953.

Adding to 20704100 its reverse (140702), we get a palindrome (20844802).

The spelling of 20704100 in words is "twenty million, seven hundred four thousand, one hundred".