20013055566547 has 16 divisors (see below), whose sum is σ = 20181588970752. Its totient is φ = 19845308166880.

The previous prime is 20013055566533. The next prime is 20013055566557. The reversal of 20013055566547 is 74566555031002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013055566547 is a prime.

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 20013055566547.

It is not an unprimeable number, because it can be changed into a prime (20013055566557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71619972 + ... + 71898862.

It is an arithmetic number, because the mean of its divisors is an integer number (1261349310672).

Almost surely, 2^{20013055566547} is an apocalyptic number.

20013055566547 is a deficient number, since it is larger than the sum of its proper divisors (168533404205).

20013055566547 is a wasteful number, since it uses less digits than its factorization.

20013055566547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280298.

The product of its (nonzero) digits is 3780000, while the sum is 49.

The spelling of 20013055566547 in words is "twenty trillion, thirteen billion, fifty-five million, five hundred sixty-six thousand, five hundred forty-seven".