20026778256 has 75 divisors (see below), whose sum is σ = 57978055443. Its totient is φ = 6673894560.

The previous prime is 20026778173. The next prime is 20026778257. The reversal of 20026778256 is 65287762002.

The square root of 20026778256 is 141516.

It is a perfect power (a square), and thus also a powerful number.

It is not an unprimeable number, because it can be changed into a prime (20026778257) by changing a digit.

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 14 ways as a sum of consecutive naturals, for example, 5092611 + ... + 5096541.

Almost surely, 2^20026778256 is an apocalyptic number.

20026778256 is the 141516-th square number.

It is an amenable number.

20026778256 is an abundant number, since it is smaller than the sum of its proper divisors (37951277187).

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

20026778256 is an frugal number, since it uses more digits than its factorization.

20026778256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7882 (or 3936 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 20026778256 in words is "twenty billion, twenty-six million, seven hundred seventy-eight thousand, two hundred fifty-six".