20728479545316 has 81 divisors (see below), whose sum is σ = 52551358757443. Its totient is φ = 6889196558640.

The previous prime is 20728479545309. The next prime is 20728479545329. The reversal of 20728479545316 is 61354597482702.

It is a happy number.

The square root of 20728479545316 is 4552854.

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

20728479545316 is a `hidden beast` number, since 2 + 0 + 7 + 2 + 8 + 4 + 7 + 95 + 4 + 531 + 6 = 666.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11445874051 + ... + 11445875861.

It is a 1-persistent number, because it is pandigital, but 2⋅20728479545316 = 41456959090632 is not.

Almost surely, 2^{20728479545316} is an apocalyptic number.

20728479545316 is the 4552854-th square number.

It is an amenable number.

20728479545316 is an abundant number, since it is smaller than the sum of its proper divisors (31822879212127).

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

20728479545316 is an frugal number, since it uses more digits than its factorization.

20728479545316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470 (or 2235 counting only the distinct ones).

The product of its (nonzero) digits is 101606400, while the sum is 63.

The spelling of 20728479545316 in words is "twenty trillion, seven hundred twenty-eight billion, four hundred seventy-nine million, five hundred forty-five thousand, three hundred sixteen".