20123310220 has 24 divisors (see below), whose sum is σ = 45509640624. Its totient is φ = 7430145216.

The previous prime is 20123310211. The next prime is 20123310253. The reversal of 20123310220 is 2201332102.

It is a super-2 number, since 2×20123310220² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20123310194 and 20123310203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38698414 + ... + 38698933.

It is an arithmetic number, because the mean of its divisors is an integer number (1896235026).

Almost surely, 2^20123310220 is an apocalyptic number.

20123310220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123310220 is an abundant number, since it is smaller than the sum of its proper divisors (25386330404).

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

20123310220 is a wasteful number, since it uses less digits than its factorization.

20123310220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77397369 (or 77397367 counting only the distinct ones).

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

Adding to 20123310220 its reverse (2201332102), we get a palindrome (22324642322).

The spelling of 20123310220 in words is "twenty billion, one hundred twenty-three million, three hundred ten thousand, two hundred twenty".