123223203420 has 96 divisors (see below), whose sum is σ = 357502118400. Its totient is φ = 31674902784.

The previous prime is 123223203407. The next prime is 123223203431. The reversal of 123223203420 is 24302322321.

It is a super-2 number, since 2×123223203420² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1019857 + ... + 1134263.

It is an arithmetic number, because the mean of its divisors is an integer number (3723980400).

Almost surely, 2^123223203420 is an apocalyptic number.

123223203420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123223203420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178751059200).

123223203420 is an abundant number, since it is smaller than the sum of its proper divisors (234278914980).

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

123223203420 is a wasteful number, since it uses less digits than its factorization.

123223203420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115067 (or 115065 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 123223203420 its reverse (24302322321), we get a palindrome (147525525741).

The spelling of 123223203420 in words is "one hundred twenty-three billion, two hundred twenty-three million, two hundred three thousand, four hundred twenty".