20617894059 has 32 divisors (see below), whose sum is σ = 32446863360. Its totient is φ = 11401370112.

The previous prime is 20617894051. The next prime is 20617894123. The reversal of 20617894059 is 95049871602.

It is not a de Polignac number, because 20617894059 - 2³ = 20617894051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20617894051) 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 31 ways as a sum of consecutive naturals, for example, 29514 + ... + 205199.

It is an arithmetic number, because the mean of its divisors is an integer number (1013964480).

Almost surely, 2^20617894059 is an apocalyptic number.

20617894059 is a deficient number, since it is larger than the sum of its proper divisors (11828969301).

20617894059 is a wasteful number, since it uses less digits than its factorization.

20617894059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234859.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 20617894059 in words is "twenty billion, six hundred seventeen million, eight hundred ninety-four thousand, fifty-nine".