20120323320 has 64 divisors (see below), whose sum is σ = 67067748000. Its totient is φ = 5365419264.

The previous prime is 20120323319. The next prime is 20120323369. The reversal of 20120323320 is 2332302102.

It is a happy number.

20120323320 is a `hidden beast` number, since 2 + 0 + 1 + 20 + 323 + 320 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 20120323293 and 20120323302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9313885 + ... + 9316044.

Almost surely, 2^20120323320 is an apocalyptic number.

20120323320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120323320 is an abundant number, since it is smaller than the sum of its proper divisors (46947424680).

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

20120323320 is a wasteful number, since it uses less digits than its factorization.

20120323320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18629949 (or 18629939 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 20120323320 its reverse (2332302102), we get a palindrome (22452625422).

The spelling of 20120323320 in words is "twenty billion, one hundred twenty million, three hundred twenty-three thousand, three hundred twenty".