20287304 has 16 divisors (see below), whose sum is σ = 38102400. Its totient is φ = 10126672.

The previous prime is 20287301. The next prime is 20287313. The reversal of 20287304 is 40378202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20287301) 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, 3989 + ... + 7515.

It is an arithmetic number, because the mean of its divisors is an integer number (2381400).

Almost surely, 2^20287304 is an apocalyptic number.

It is an amenable number.

20287304 is a deficient number, since it is larger than the sum of its proper divisors (17815096).

20287304 is a wasteful number, since it uses less digits than its factorization.

20287304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252 (or 4248 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20287304 is about 4504.1429817447. The cubic root of 20287304 is about 272.7353587636.

The spelling of 20287304 in words is "twenty million, two hundred eighty-seven thousand, three hundred four".