20504524655 has 12 divisors (see below), whose sum is σ = 24920871192. Its totient is φ = 16195954320.

The previous prime is 20504524639. The next prime is 20504524657. The reversal of 20504524655 is 55642540502.

It is a happy number.

It is not a de Polignac number, because 20504524655 - 2⁴ = 20504524639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20504524657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 297341 + ... + 359750.

It is an arithmetic number, because the mean of its divisors is an integer number (2076739266).

Almost surely, 2^20504524655 is an apocalyptic number.

20504524655 is a deficient number, since it is larger than the sum of its proper divisors (4416346537).

20504524655 is an frugal number, since it uses more digits than its factorization.

20504524655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657254 (or 657175 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 20504524655 in words is "twenty billion, five hundred four million, five hundred twenty-four thousand, six hundred fifty-five".