20617666160 has 80 divisors (see below), whose sum is σ = 58998265536. Its totient is φ = 6525149184.

The previous prime is 20617666127. The next prime is 20617666231. The reversal of 20617666160 is 6166671602.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1408769 + ... + 1423328.

Almost surely, 2^20617666160 is an apocalyptic number.

20617666160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20617666160 is an abundant number, since it is smaller than the sum of its proper divisors (38380599376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20617666160 is a wasteful number, since it uses less digits than its factorization.

20617666160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832130 (or 2832124 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 20617666160 in words is "twenty billion, six hundred seventeen million, six hundred sixty-six thousand, one hundred sixty".