20207304 has 48 divisors (see below), whose sum is σ = 58940700. Its totient is φ = 6217344.

The previous prime is 20207303. The next prime is 20207309. The reversal of 20207304 is 40370202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19342404 + 864900 = 4398^2 + 930^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20207303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9859 + ... + 11730.

Almost surely, 2^20207304 is an apocalyptic number.

20207304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20207304 is an abundant number, since it is smaller than the sum of its proper divisors (38733396).

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

20207304 is a wasteful number, since it uses less digits than its factorization.

20207304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21614 (or 21607 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 20207304 is about 4495.2534967452. The cubic root of 20207304 is about 272.3763892413.

Adding to 20207304 its reverse (40370202), we get a palindrome (60577506).

The spelling of 20207304 in words is "twenty million, two hundred seven thousand, three hundred four".