20176400865385 has 8 divisors (see below), whose sum is σ = 24213770663616. Its totient is φ = 16139727608880.

The previous prime is 20176400865377. The next prime is 20176400865409. The reversal of 20176400865385 is 58356800467102.

It is a happy number.

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

It is not a de Polignac number, because 20176400865385 - 2³ = 20176400865377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174071701 + ... + 174187570.

It is an arithmetic number, because the mean of its divisors is an integer number (3026721332952).

Almost surely, 2^{20176400865385} is an apocalyptic number.

It is an amenable number.

20176400865385 is a deficient number, since it is larger than the sum of its proper divisors (4037369798231).

20176400865385 is a wasteful number, since it uses less digits than its factorization.

20176400865385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348270863.

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 20176400865385 in words is "twenty trillion, one hundred seventy-six billion, four hundred million, eight hundred sixty-five thousand, three hundred eighty-five".