20479910751720 has 576 divisors, whose sum is σ = 77970600162000. Its totient is φ = 4648343003136.

The previous prime is 20479910751719. The next prime is 20479910751737. The reversal of 20479910751720 is 2715701997402.

20479910751720 is a `hidden beast` number, since 2 + 0 + 4 + 7 + 99 + 10 + 7 + 517 + 20 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 12530792892996 + 7949117858724 = 3539886^2 + 2819418^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1571382324 + ... + 1571395356.

Almost surely, 2^{20479910751720} is an apocalyptic number.

20479910751720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20479910751720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38985300081000).

20479910751720 is an abundant number, since it is smaller than the sum of its proper divisors (57490689410280).

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

20479910751720 is a wasteful number, since it uses less digits than its factorization.

20479910751720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13682 (or 13668 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 54.

The spelling of 20479910751720 in words is "twenty trillion, four hundred seventy-nine billion, nine hundred ten million, seven hundred fifty-one thousand, seven hundred twenty".