123319506920 has 32 divisors (see below), whose sum is σ = 277508007720. Its totient is φ = 49320848640.

The previous prime is 123319506913. The next prime is 123319506971. The reversal of 123319506920 is 29605913321.

It can be written as a sum of positive squares in 4 ways, for example, as 95657829796 + 27661677124 = 309286^2 + 166318^2 .

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, 74810 + ... + 502230.

Almost surely, 2^123319506920 is an apocalyptic number.

123319506920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123319506920 is an abundant number, since it is smaller than the sum of its proper divisors (154188500800).

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

123319506920 is a wasteful number, since it uses less digits than its factorization.

123319506920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434645 (or 434641 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 41.

The spelling of 123319506920 in words is "one hundred twenty-three billion, three hundred nineteen million, five hundred six thousand, nine hundred twenty".