20120340224 has 18 divisors (see below), whose sum is σ = 40162085880. Its totient is φ = 10060169984.

The previous prime is 20120340217. The next prime is 20120340257. The reversal of 20120340224 is 42204302102.

It is a junction number, because it is equal to n+sod(n) for n = 20120340196 and 20120340205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39297284 + ... + 39297795.

Almost surely, 2^20120340224 is an apocalyptic number.

It is an amenable number.

20120340224 is a deficient number, since it is larger than the sum of its proper divisors (20041745656).

20120340224 is an frugal number, since it uses more digits than its factorization.

20120340224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78595095 (or 78595081 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20120340224 its reverse (42204302102), we get a palindrome (62324642326).

The spelling of 20120340224 in words is "twenty billion, one hundred twenty million, three hundred forty thousand, two hundred twenty-four".