20685081145466 has 8 divisors (see below), whose sum is σ = 31687783882560. Its totient is φ = 10122486517948.

The previous prime is 20685081145459. The next prime is 20685081145501. The reversal of 20685081145466 is 66454118058602.

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

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 3 ways as a sum of consecutive naturals, for example, 110027027276 + ... + 110027027463.

It is an arithmetic number, because the mean of its divisors is an integer number (3960972985320).

Almost surely, 2^{20685081145466} is an apocalyptic number.

20685081145466 is a deficient number, since it is larger than the sum of its proper divisors (11002702737094).

20685081145466 is a wasteful number, since it uses less digits than its factorization.

20685081145466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220054054788.

The product of its (nonzero) digits is 11059200, while the sum is 56.

The spelling of 20685081145466 in words is "twenty trillion, six hundred eighty-five billion, eighty-one million, one hundred forty-five thousand, four hundred sixty-six".