123523533020 has 24 divisors (see below), whose sum is σ = 273052021200. Its totient is φ = 46808917632.

The previous prime is 123523533013. The next prime is 123523533037. The reversal of 123523533020 is 20335325321.

It is a congruent number.

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, 162530585 + ... + 162531344.

It is an arithmetic number, because the mean of its divisors is an integer number (11377167550).

Almost surely, 2^123523533020 is an apocalyptic number.

123523533020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123523533020 is an abundant number, since it is smaller than the sum of its proper divisors (149528488180).

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

123523533020 is a wasteful number, since it uses less digits than its factorization.

123523533020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325061957 (or 325061955 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 29.

Adding to 123523533020 its reverse (20335325321), we get a palindrome (143858858341).

The spelling of 123523533020 in words is "one hundred twenty-three billion, five hundred twenty-three million, five hundred thirty-three thousand, twenty".