20072304 has 60 divisors (see below), whose sum is σ = 64202736. Its totient is φ = 5734656.

The previous prime is 20072287. The next prime is 20072317. The reversal of 20072304 is 40327002.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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, 8949 + ... + 10964.

Almost surely, 2^20072304 is an apocalyptic number.

20072304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20072304 is an abundant number, since it is smaller than the sum of its proper divisors (44130432).

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

20072304 is a wasteful number, since it uses less digits than its factorization.

20072304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19934 (or 19925 counting only the distinct ones).

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

The square root of 20072304 is about 4480.2124949605. The cubic root of 20072304 is about 271.7684736844.

Adding to 20072304 its reverse (40327002), we get a palindrome (60399306).

The spelling of 20072304 in words is "twenty million, seventy-two thousand, three hundred four".