20355265560545 has 32 divisors (see below), whose sum is σ = 26706495246336. Its totient is φ = 14826898713600.

The previous prime is 20355265560541. The next prime is 20355265560547. The reversal of 20355265560545 is 54506556255302.

It is not a de Polignac number, because 20355265560545 - 2² = 20355265560541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20355265560541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6485480 + ... + 9097910.

It is an arithmetic number, because the mean of its divisors is an integer number (834577976448).

Almost surely, 2^{20355265560545} is an apocalyptic number.

It is an amenable number.

20355265560545 is a deficient number, since it is larger than the sum of its proper divisors (6351229685791).

20355265560545 is a wasteful number, since it uses less digits than its factorization.

20355265560545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615441.

The product of its (nonzero) digits is 27000000, while the sum is 53.

The spelling of 20355265560545 in words is "twenty trillion, three hundred fifty-five billion, two hundred sixty-five million, five hundred sixty thousand, five hundred forty-five".