20996154851328 has 360 divisors, whose sum is σ = 62986923125280. Its totient is φ = 6969950208000.

The previous prime is 20996154851303. The next prime is 20996154851339. The reversal of 20996154851328 is 82315845169902.

20996154851328 is a `hidden beast` number, since 2 + 0 + 9 + 9 + 6 + 1 + 548 + 51 + 32 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2664820893 + ... + 2664828771.

It is an arithmetic number, because the mean of its divisors is an integer number (174963675348).

Almost surely, 2^{20996154851328} 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 20996154851328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31493461562640).

20996154851328 is an abundant number, since it is smaller than the sum of its proper divisors (41990768273952).

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

20996154851328 is an frugal number, since it uses more digits than its factorization.

20996154851328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8176 (or 8135 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 63.

The spelling of 20996154851328 in words is "twenty trillion, nine hundred ninety-six billion, one hundred fifty-four million, eight hundred fifty-one thousand, three hundred twenty-eight".