20728104307360 has 24 divisors (see below), whose sum is σ = 48970146426516. Its totient is φ = 8291241722880.

The previous prime is 20728104307349. The next prime is 20728104307403. The reversal of 20728104307360 is 6370340182702.

It can be written as a sum of positive squares in 2 ways, for example, as 17218881390096 + 3509222917264 = 4149564^2 + 1873292^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64775325801 + ... + 64775326120.

Almost surely, 2^{20728104307360} is an apocalyptic number.

20728104307360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20728104307360 is an abundant number, since it is smaller than the sum of its proper divisors (28242042119156).

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

20728104307360 is a wasteful number, since it uses less digits than its factorization.

20728104307360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129550651936 (or 129550651928 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 20728104307360 in words is "twenty trillion, seven hundred twenty-eight billion, one hundred four million, three hundred seven thousand, three hundred sixty".