20231323320 has 64 divisors (see below), whose sum is σ = 65362741920. Its totient is φ = 4980017664.

The previous prime is 20231323309. The next prime is 20231323363. The reversal of 20231323320 is 2332313202.

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, 6482839 + ... + 6485958.

Almost surely, 2^20231323320 is an apocalyptic number.

20231323320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20231323320 is an abundant number, since it is smaller than the sum of its proper divisors (45131418600).

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

20231323320 is a wasteful number, since it uses less digits than its factorization.

20231323320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12968824 (or 12968820 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 20231323320 its reverse (2332313202), we get a palindrome (22563636522).

The spelling of 20231323320 in words is "twenty billion, two hundred thirty-one million, three hundred twenty-three thousand, three hundred twenty".