20684304 has 45 divisors (see below), whose sum is σ = 58040463. Its totient is φ = 6876576.

The previous prime is 20684281. The next prime is 20684309. The reversal of 20684304 is 40348602.

The square root of 20684304 is 4548.

It is a perfect power (a square), and thus also a powerful number.

It is not an unprimeable number, because it can be changed into a prime (20684309) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 54387 + ... + 54765.

Almost surely, 2^20684304 is an apocalyptic number.

20684304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

20684304 is the 4548-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20684304

20684304 is an abundant number, since it is smaller than the sum of its proper divisors (37356159).

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

20684304 is an equidigital number, since it uses as much as digits as its factorization.

20684304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The cubic root of 20684304 is about 274.5029213262.

The spelling of 20684304 in words is "twenty million, six hundred eighty-four thousand, three hundred four".