20307706563 has 8 divisors (see below), whose sum is σ = 27086620176. Its totient is φ = 13533632000.

The previous prime is 20307706543. The next prime is 20307706571. The reversal of 20307706563 is 36560770302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20307706563 - 2¹³ = 20307698371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20307706543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1199958 + ... + 1216763.

It is an arithmetic number, because the mean of its divisors is an integer number (3385827522).

Almost surely, 2^20307706563 is an apocalyptic number.

20307706563 is a deficient number, since it is larger than the sum of its proper divisors (6778913613).

20307706563 is a wasteful number, since it uses less digits than its factorization.

20307706563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419525.

The product of its (nonzero) digits is 158760, while the sum is 39.

The spelling of 20307706563 in words is "twenty billion, three hundred seven million, seven hundred six thousand, five hundred sixty-three".