20415655425556 has 24 divisors (see below), whose sum is σ = 36130546526760. Its totient is φ = 10092653041152.

The previous prime is 20415655425553. The next prime is 20415655425589. The reversal of 20415655425556 is 65552455651402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 718781796100 + 19696873629456 = 847810^2 + 4438116^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20415655425497 and 20415655425506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415655425553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6191730 + ... + 8897686.

It is an arithmetic number, because the mean of its divisors is an integer number (1505439438615).

Almost surely, 2^{20415655425556} is an apocalyptic number.

It is an amenable number.

20415655425556 is a deficient number, since it is larger than the sum of its proper divisors (15714891101204).

20415655425556 is a wasteful number, since it uses less digits than its factorization.

20415655425556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2727243 (or 2727241 counting only the distinct ones).

The product of its (nonzero) digits is 36000000, while the sum is 55.

The spelling of 20415655425556 in words is "twenty trillion, four hundred fifteen billion, six hundred fifty-five million, four hundred twenty-five thousand, five hundred fifty-six".