20606304 has 48 divisors (see below), whose sum is σ = 55254528. Its totient is φ = 6721152.

The previous prime is 20606293. The next prime is 20606309. The reversal of 20606304 is 40360602.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20606309) 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, 2229 + ... + 6795.

It is an arithmetic number, because the mean of its divisors is an integer number (1151136).

Almost surely, 2^20606304 is an apocalyptic number.

20606304 is a gapful number since it is divisible by the number (24) 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 20606304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27627264).

20606304 is an abundant number, since it is smaller than the sum of its proper divisors (34648224).

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

20606304 is a wasteful number, since it uses less digits than its factorization.

20606304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4627 (or 4619 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20606304 is about 4539.4167026172. The cubic root of 20606304 is about 274.1574387785.

Adding to 20606304 its reverse (40360602), we get a palindrome (60966906).

It can be divided in two parts, 20606 and 304, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20606304 in words is "twenty million, six hundred six thousand, three hundred four".