20123312120 has 32 divisors (see below), whose sum is σ = 45527620320. Its totient is φ = 8004850560.

The previous prime is 20123312117. The next prime is 20123312141. The reversal of 20123312120 is 2121332102.

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, 1382492 + ... + 1396971.

It is an arithmetic number, because the mean of its divisors is an integer number (1422738135).

Almost surely, 2^20123312120 is an apocalyptic number.

20123312120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123312120 is an abundant number, since it is smaller than the sum of its proper divisors (25404308200).

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

20123312120 is a wasteful number, since it uses less digits than its factorization.

20123312120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779655 (or 2779651 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20123312120 its reverse (2121332102), we get a palindrome (22244644222).

The spelling of 20123312120 in words is "twenty billion, one hundred twenty-three million, three hundred twelve thousand, one hundred twenty".