20244736656 has 135 divisors (see below), whose sum is σ = 57812542723. Its totient is φ = 6613360320.

The previous prime is 20244736601. The next prime is 20244736657. The reversal of 20244736656 is 65663744202.

The square root of 20244736656 is 142284.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20244736657) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 121225885 + ... + 121226051.

Almost surely, 2^20244736656 is an apocalyptic number.

20244736656 is the 142284-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20244736656

20244736656 is an abundant number, since it is smaller than the sum of its proper divisors (37567806067).

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

20244736656 is an equidigital number, since it uses as much as digits as its factorization.

20244736656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 45.

It can be divided in two parts, 20244 and 736656, that added together give a square (756900 = 870²).

The spelling of 20244736656 in words is "twenty billion, two hundred forty-four million, seven hundred thirty-six thousand, six hundred fifty-six".