20289617392947 has 32 divisors (see below), whose sum is σ = 30990957895680. Its totient is φ = 11566531136160.

The previous prime is 20289617392927. The next prime is 20289617392963. The reversal of 20289617392947 is 74929371698202.

It is not a de Polignac number, because 20289617392947 - 2¹⁴ = 20289617376563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20289617392927) 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, 81546822 + ... + 81795252.

It is an arithmetic number, because the mean of its divisors is an integer number (968467434240).

Almost surely, 2^{20289617392947} is an apocalyptic number.

20289617392947 is a deficient number, since it is larger than the sum of its proper divisors (10701340502733).

20289617392947 is a wasteful number, since it uses less digits than its factorization.

20289617392947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257663.

The product of its (nonzero) digits is 164602368, while the sum is 69.

The spelling of 20289617392947 in words is "twenty trillion, two hundred eighty-nine billion, six hundred seventeen million, three hundred ninety-two thousand, nine hundred forty-seven".