20213312320 has 56 divisors (see below), whose sum is σ = 48145135104. Its totient is φ = 8083278336.

The previous prime is 20213312309. The next prime is 20213312321. The reversal of 20213312320 is 2321331202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213312321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2276209 + ... + 2285071.

Almost surely, 2^20213312320 is an apocalyptic number.

20213312320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20213312320 is an abundant number, since it is smaller than the sum of its proper divisors (27931822784).

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

20213312320 is an equidigital number, since it uses as much as digits as its factorization.

20213312320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16007 (or 15997 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20213312320 its reverse (2321331202), we get a palindrome (22534643522).

The spelling of 20213312320 in words is "twenty billion, two hundred thirteen million, three hundred twelve thousand, three hundred twenty".