20554503424625 has 8 divisors (see below), whose sum is σ = 25652020274088. Its totient is φ = 16443602739600.

The previous prime is 20554503424619. The next prime is 20554503424627. The reversal of 20554503424625 is 52642430545502.

It can be written as a sum of positive squares in 4 ways, for example, as 99154452544 + 20455348972081 = 314888^2 + 4522759^2 .

It is not a de Polignac number, because 20554503424625 - 2⁸ = 20554503424369 is a prime.

It is a super-2 number, since 2×20554503424625² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20554503424625.

It is not an unprimeable number, because it can be changed into a prime (20554503424627) 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, 82218013574 + ... + 82218013823.

It is an arithmetic number, because the mean of its divisors is an integer number (3206502534261).

Almost surely, 2^{20554503424625} is an apocalyptic number.

20554503424625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20554503424625 is a deficient number, since it is larger than the sum of its proper divisors (5097516849463).

20554503424625 is an equidigital number, since it uses as much as digits as its factorization.

20554503424625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164436027412 (or 164436027402 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 47.

The spelling of 20554503424625 in words is "twenty trillion, five hundred fifty-four billion, five hundred three million, four hundred twenty-four thousand, six hundred twenty-five".