123533709820 has 24 divisors (see below), whose sum is σ = 259447053600. Its totient is φ = 49408481472.

The previous prime is 123533709721. The next prime is 123533709841. The reversal of 123533709820 is 28907335321.

123533709820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106855 + ... + 508414.

It is an arithmetic number, because the mean of its divisors is an integer number (10810293900).

Almost surely, 2^123533709820 is an apocalyptic number.

123533709820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123533709820 is an abundant number, since it is smaller than the sum of its proper divisors (135913343780).

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

123533709820 is a wasteful number, since it uses less digits than its factorization.

123533709820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625317 (or 625315 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 123533709820 in words is "one hundred twenty-three billion, five hundred thirty-three million, seven hundred nine thousand, eight hundred twenty".