20704600 has 96 divisors (see below), whose sum is σ = 57496320. Its totient is φ = 6779520.

The previous prime is 20704583. The next prime is 20704601. The reversal of 20704600 is 640702.

It is a super-2 number, since 2×20704600² = 857360922320000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20704601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31879 + ... + 32521.

It is an arithmetic number, because the mean of its divisors is an integer number (598920).

Almost surely, 2^20704600 is an apocalyptic number.

20704600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20704600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28748160).

20704600 is an abundant number, since it is smaller than the sum of its proper divisors (36791720).

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

20704600 is a wasteful number, since it uses less digits than its factorization.

20704600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 20704600 is about 4550.2307633789. The cubic root of 20704600 is about 274.5926752130.

It can be divided in two parts, 2070 and 4600, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 20704600 in words is "twenty million, seven hundred four thousand, six hundred".