20012304 has 60 divisors (see below), whose sum is σ = 56003856. Its totient is φ = 6155136.

The previous prime is 20012303. The next prime is 20012341. The reversal of 20012304 is 40321002.

It is a super-2 number, since 2×20012304² = 800984622776832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20012304.

It is not an unprimeable number, because it can be changed into a prime (20012303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6879 + ... + 9345.

Almost surely, 2^20012304 is an apocalyptic number.

20012304 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 20012304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28001928).

20012304 is an abundant number, since it is smaller than the sum of its proper divisors (35991552).

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

20012304 is a wasteful number, since it uses less digits than its factorization.

20012304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504 (or 2485 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 20012304 is about 4473.5113725126. The cubic root of 20012304 is about 271.4974139059.

Adding to 20012304 its reverse (40321002), we get a palindrome (60333306).

The spelling of 20012304 in words is "twenty million, twelve thousand, three hundred four".