20353265256447 has 12 divisors (see below), whose sum is σ = 29406461490120. Its totient is φ = 13565474013168.

The previous prime is 20353265256437. The next prime is 20353265256461. The reversal of 20353265256447 is 74465256235302.

20353265256447 is a `hidden beast` number, since 2 + 0 + 3 + 5 + 3 + 26 + 52 + 564 + 4 + 7 = 666.

It is not a de Polignac number, because 20353265256447 - 2⁷ = 20353265256319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20353265256393 and 20353265256402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353265256437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280752672 + ... + 280825157.

It is an arithmetic number, because the mean of its divisors is an integer number (2450538457510).

Almost surely, 2^{20353265256447} is an apocalyptic number.

20353265256447 is a deficient number, since it is larger than the sum of its proper divisors (9053196233673).

20353265256447 is a wasteful number, since it uses less digits than its factorization.

20353265256447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561581862 (or 561581859 counting only the distinct ones).

The product of its (nonzero) digits is 36288000, while the sum is 54.

The spelling of 20353265256447 in words is "twenty trillion, three hundred fifty-three billion, two hundred sixty-five million, two hundred fifty-six thousand, four hundred forty-seven".