20117553365025 has 48 divisors (see below), whose sum is σ = 38231059305600. Its totient is φ = 10359383791680.

The previous prime is 20117553364999. The next prime is 20117553365047. The reversal of 20117553365025 is 52056335571102.

20117553365025 is a `hidden beast` number, since 2 + 0 + 1 + 17 + 553 + 3 + 65 + 0 + 25 = 666.

It is not a de Polignac number, because 20117553365025 - 2¹³ = 20117553356833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 513838749 + ... + 513877898.

It is an arithmetic number, because the mean of its divisors is an integer number (796480402200).

Almost surely, 2^{20117553365025} is an apocalyptic number.

20117553365025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20117553365025 is a deficient number, since it is larger than the sum of its proper divisors (18113505940575).

20117553365025 is a wasteful number, since it uses less digits than its factorization.

20117553365025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027716695 (or 1027716684 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 45.

The spelling of 20117553365025 in words is "twenty trillion, one hundred seventeen billion, five hundred fifty-three million, three hundred sixty-five thousand, twenty-five".