20261175603543 has 24 divisors (see below), whose sum is σ = 33467679273600. Its totient is φ = 11570663358864.

The previous prime is 20261175603533. The next prime is 20261175603553. The reversal of 20261175603543 is 34530657116202.

20261175603543 is a `hidden beast` number, since 2 + 0 + 2 + 6 + 1 + 17 + 560 + 35 + 43 = 666.

It is an interprime number because it is at equal distance from previous prime (20261175603533) and next prime (20261175603553).

It is a de Polignac number, because none of the positive numbers 2^k-20261175603543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261175603523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99220413 + ... + 99424406.

It is an arithmetic number, because the mean of its divisors is an integer number (1394486636400).

Almost surely, 2^{20261175603543} is an apocalyptic number.

20261175603543 is a deficient number, since it is larger than the sum of its proper divisors (13206503670057).

20261175603543 is a wasteful number, since it uses less digits than its factorization.

20261175603543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198646451 (or 198646448 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 20261175603543 in words is "twenty trillion, two hundred sixty-one billion, one hundred seventy-five million, six hundred three thousand, five hundred forty-three".