20720302630625 has 20 divisors (see below), whose sum is σ = 27883789421796. Its totient is φ = 15301146552000.

The previous prime is 20720302630609. The next prime is 20720302630639. The reversal of 20720302630625 is 52603620302702.

It can be written as a sum of positive squares in 10 ways, for example, as 20004356500129 + 715946130496 = 4472623^2 + 846136^2 .

It is not a de Polignac number, because 20720302630625 - 2⁴ = 20720302630609 is a prime.

It is a super-2 number, since 2×20720302630625² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1275087422 + ... + 1275103671.

Almost surely, 2^{20720302630625} is an apocalyptic number.

20720302630625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20720302630625 is a deficient number, since it is larger than the sum of its proper divisors (7163486791171).

20720302630625 is an equidigital number, since it uses as much as digits as its factorization.

20720302630625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550191126 (or 2550191111 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 38.

The spelling of 20720302630625 in words is "twenty trillion, seven hundred twenty billion, three hundred two million, six hundred thirty thousand, six hundred twenty-five".