20345310553547 has 16 divisors (see below), whose sum is σ = 24174516172800. Its totient is φ = 16754882253120.

The previous prime is 20345310553507. The next prime is 20345310553559. The reversal of 20345310553547 is 74535501354302.

It is a cyclic number.

It is not a de Polignac number, because 20345310553547 - 2²⁸ = 20345042118091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20345310553507) 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, 337225922 + ... + 337286247.

It is an arithmetic number, because the mean of its divisors is an integer number (1510907260800).

Almost surely, 2^{20345310553547} is an apocalyptic number.

20345310553547 is a deficient number, since it is larger than the sum of its proper divisors (3829205619253).

20345310553547 is a wasteful number, since it uses less digits than its factorization.

20345310553547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674512346.

The product of its (nonzero) digits is 3780000, while the sum is 47.

The spelling of 20345310553547 in words is "twenty trillion, three hundred forty-five billion, three hundred ten million, five hundred fifty-three thousand, five hundred forty-seven".