12320021304 has 24 divisors (see below), whose sum is σ = 33366724560. Its totient is φ = 4106673744.

The previous prime is 12320021293. The next prime is 12320021327. The reversal of 12320021304 is 40312002321.

It is a tau number, because it is divible by the number of its divisors (24).

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 polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85555632 + ... + 85555775.

It is an arithmetic number, because the mean of its divisors is an integer number (1390280190).

Almost surely, 2^12320021304 is an apocalyptic number.

It is an amenable number.

12320021304 is an abundant number, since it is smaller than the sum of its proper divisors (21046703256).

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

12320021304 is a wasteful number, since it uses less digits than its factorization.

12320021304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171111419 (or 171111412 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 12320021304 its reverse (40312002321), we get a palindrome (52632023625).

The spelling of 12320021304 in words is "twelve billion, three hundred twenty million, twenty-one thousand, three hundred four".