20246128512 has 192 divisors, whose sum is σ = 57441149040. Its totient is φ = 6317015040.

The previous prime is 20246128501. The next prime is 20246128517. The reversal of 20246128512 is 21582164202.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-3 number, since 3×20246128512³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20246128517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26744838 + ... + 26745594.

Almost surely, 2^20246128512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20246128512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28720574520).

20246128512 is an abundant number, since it is smaller than the sum of its proper divisors (37195020528).

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

20246128512 is a wasteful number, since it uses less digits than its factorization.

20246128512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The spelling of 20246128512 in words is "twenty billion, two hundred forty-six million, one hundred twenty-eight thousand, five hundred twelve".