20073456256 has 128 divisors (see below), whose sum is σ = 46838856960. Its totient is φ = 8391720960.

The previous prime is 20073456239. The next prime is 20073456283. The reversal of 20073456256 is 65265437002.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6169126 + ... + 6172378.

It is an arithmetic number, because the mean of its divisors is an integer number (365928570).

Almost surely, 2^20073456256 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 20073456256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23419428480).

20073456256 is an abundant number, since it is smaller than the sum of its proper divisors (26765400704).

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

20073456256 is an equidigital number, since it uses as much as digits as its factorization.

20073456256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3442 (or 3430 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 20073456256 in words is "twenty billion, seventy-three million, four hundred fifty-six thousand, two hundred fifty-six".