20789112120 has 512 divisors, whose sum is σ = 77750599680. Its totient is φ = 4342947840.

The previous prime is 20789112119. The next prime is 20789112163. The reversal of 20789112120 is 2121198702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 61688592 + ... + 61688928.

It is an arithmetic number, because the mean of its divisors is an integer number (151856640).

Almost surely, 2^20789112120 is an apocalyptic number.

20789112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20789112120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38875299840).

20789112120 is an abundant number, since it is smaller than the sum of its proper divisors (56961487560).

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

20789112120 is a wasteful number, since it uses less digits than its factorization.

20789112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The spelling of 20789112120 in words is "twenty billion, seven hundred eighty-nine million, one hundred twelve thousand, one hundred twenty".