20123435320000 has 70 divisors (see below), whose sum is σ = 49899579576308. Its totient is φ = 8049374112000.

The previous prime is 20123435319973. The next prime is 20123435320031. The reversal of 20123435320000 is 2353432102.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 251502942 + ... + 251582941.

Almost surely, 2^{20123435320000} is an apocalyptic number.

20123435320000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123435320000 is an abundant number, since it is smaller than the sum of its proper divisors (29776144256308).

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

20123435320000 is an frugal number, since it uses more digits than its factorization.

20123435320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503085915 (or 503085890 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 20123435320000 its reverse (2353432102), we get a palindrome (20125788752102).

The spelling of 20123435320000 in words is "twenty trillion, one hundred twenty-three billion, four hundred thirty-five million, three hundred twenty thousand".