20321420324 has 12 divisors (see below), whose sum is σ = 35570513664. Its totient is φ = 10158416424.

The previous prime is 20321420323. The next prime is 20321420369. The reversal of 20321420324 is 42302412302.

It is a self number, because there is not a number n which added to its sum of digits gives 20321420324.

It is not an unprimeable number, because it can be changed into a prime (20321420323) 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, 553424 + ... + 588999.

It is an arithmetic number, because the mean of its divisors is an integer number (2964209472).

Almost surely, 2^20321420324 is an apocalyptic number.

It is an amenable number.

20321420324 is a deficient number, since it is larger than the sum of its proper divisors (15249093340).

20321420324 is a wasteful number, since it uses less digits than its factorization.

20321420324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146874 (or 1146872 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20321420324 its reverse (42302412302), we get a palindrome (62623832626).

The spelling of 20321420324 in words is "twenty billion, three hundred twenty-one million, four hundred twenty thousand, three hundred twenty-four".