20120320021320 has 96 divisors (see below), whose sum is σ = 66038476228920. Its totient is φ = 5312295705600.

The previous prime is 20120320021303. The next prime is 20120320021349. The reversal of 20120320021320 is 2312002302102.

20120320021320 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 0 + 320 + 0 + 21 + 320 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 16550918431524 + 3569401589796 = 4068282^2 + 1889286^2 .

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 = 20120320021293 and 20120320021302.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276645709 + ... + 276718428.

Almost surely, 2^{20120320021320} is an apocalyptic number.

20120320021320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120320021320 is an abundant number, since it is smaller than the sum of its proper divisors (45918156207600).

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

20120320021320 is a wasteful number, since it uses less digits than its factorization.

20120320021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553364255 (or 553364248 counting only the distinct ones).

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

Adding to 20120320021320 its reverse (2312002302102), we get a palindrome (22432322323422).

The spelling of 20120320021320 in words is "twenty trillion, one hundred twenty billion, three hundred twenty million, twenty-one thousand, three hundred twenty".