20669304 has 16 divisors (see below), whose sum is σ = 51673320. Its totient is φ = 6889760.

The previous prime is 20669303. The next prime is 20669317. The reversal of 20669304 is 40396602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20669303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430587 + ... + 430634.

Almost surely, 2^20669304 is an apocalyptic number.

20669304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20669304 is an abundant number, since it is smaller than the sum of its proper divisors (31004016).

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

20669304 is a wasteful number, since it uses less digits than its factorization.

20669304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861230 (or 861226 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 20669304 is about 4546.3506244019. The cubic root of 20669304 is about 274.4365499115.

The spelling of 20669304 in words is "twenty million, six hundred sixty-nine thousand, three hundred four".