20323011220 has 24 divisors (see below), whose sum is σ = 42689533824. Its totient is φ = 8127069216.

The previous prime is 20323011193. The next prime is 20323011221. The reversal of 20323011220 is 2211032302.

It is a junction number, because it is equal to n+sod(n) for n = 20323011194 and 20323011203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323011221) 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, 54264 + ... + 208783.

It is an arithmetic number, because the mean of its divisors is an integer number (1778730576).

Almost surely, 2^20323011220 is an apocalyptic number.

20323011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20323011220 is an abundant number, since it is smaller than the sum of its proper divisors (22366522604).

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

20323011220 is a wasteful number, since it uses less digits than its factorization.

20323011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266919 (or 266917 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20323011220 its reverse (2211032302), we get a palindrome (22534043522).

The spelling of 20323011220 in words is "twenty billion, three hundred twenty-three million, eleven thousand, two hundred twenty".